13 #include <symbol/kallsyms.h>
15 #include "linux/hash.h"
17 static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock);
19 static void dsos__init(struct dsos *dsos)
21 INIT_LIST_HEAD(&dsos->head);
23 pthread_rwlock_init(&dsos->lock, NULL);
26 int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
28 memset(machine, 0, sizeof(*machine));
29 map_groups__init(&machine->kmaps, machine);
30 RB_CLEAR_NODE(&machine->rb_node);
31 dsos__init(&machine->dsos);
33 machine->threads = RB_ROOT;
34 pthread_rwlock_init(&machine->threads_lock, NULL);
35 machine->nr_threads = 0;
36 INIT_LIST_HEAD(&machine->dead_threads);
37 machine->last_match = NULL;
39 machine->vdso_info = NULL;
44 machine->id_hdr_size = 0;
45 machine->kptr_restrict_warned = false;
46 machine->comm_exec = false;
47 machine->kernel_start = 0;
49 memset(machine->vmlinux_maps, 0, sizeof(machine->vmlinux_maps));
51 machine->root_dir = strdup(root_dir);
52 if (machine->root_dir == NULL)
55 if (pid != HOST_KERNEL_ID) {
56 struct thread *thread = machine__findnew_thread(machine, -1,
63 snprintf(comm, sizeof(comm), "[guest/%d]", pid);
64 thread__set_comm(thread, comm, 0);
68 machine->current_tid = NULL;
73 struct machine *machine__new_host(void)
75 struct machine *machine = malloc(sizeof(*machine));
77 if (machine != NULL) {
78 machine__init(machine, "", HOST_KERNEL_ID);
80 if (machine__create_kernel_maps(machine) < 0)
90 static void dsos__purge(struct dsos *dsos)
94 pthread_rwlock_wrlock(&dsos->lock);
96 list_for_each_entry_safe(pos, n, &dsos->head, node) {
97 RB_CLEAR_NODE(&pos->rb_node);
99 list_del_init(&pos->node);
103 pthread_rwlock_unlock(&dsos->lock);
106 static void dsos__exit(struct dsos *dsos)
109 pthread_rwlock_destroy(&dsos->lock);
112 void machine__delete_threads(struct machine *machine)
116 pthread_rwlock_wrlock(&machine->threads_lock);
117 nd = rb_first(&machine->threads);
119 struct thread *t = rb_entry(nd, struct thread, rb_node);
122 __machine__remove_thread(machine, t, false);
124 pthread_rwlock_unlock(&machine->threads_lock);
127 void machine__exit(struct machine *machine)
129 machine__destroy_kernel_maps(machine);
130 map_groups__exit(&machine->kmaps);
131 dsos__exit(&machine->dsos);
132 machine__exit_vdso(machine);
133 zfree(&machine->root_dir);
134 zfree(&machine->current_tid);
135 pthread_rwlock_destroy(&machine->threads_lock);
138 void machine__delete(struct machine *machine)
141 machine__exit(machine);
146 void machines__init(struct machines *machines)
148 machine__init(&machines->host, "", HOST_KERNEL_ID);
149 machines->guests = RB_ROOT;
152 void machines__exit(struct machines *machines)
154 machine__exit(&machines->host);
158 struct machine *machines__add(struct machines *machines, pid_t pid,
159 const char *root_dir)
161 struct rb_node **p = &machines->guests.rb_node;
162 struct rb_node *parent = NULL;
163 struct machine *pos, *machine = malloc(sizeof(*machine));
168 if (machine__init(machine, root_dir, pid) != 0) {
175 pos = rb_entry(parent, struct machine, rb_node);
182 rb_link_node(&machine->rb_node, parent, p);
183 rb_insert_color(&machine->rb_node, &machines->guests);
188 void machines__set_comm_exec(struct machines *machines, bool comm_exec)
192 machines->host.comm_exec = comm_exec;
194 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
195 struct machine *machine = rb_entry(nd, struct machine, rb_node);
197 machine->comm_exec = comm_exec;
201 struct machine *machines__find(struct machines *machines, pid_t pid)
203 struct rb_node **p = &machines->guests.rb_node;
204 struct rb_node *parent = NULL;
205 struct machine *machine;
206 struct machine *default_machine = NULL;
208 if (pid == HOST_KERNEL_ID)
209 return &machines->host;
213 machine = rb_entry(parent, struct machine, rb_node);
214 if (pid < machine->pid)
216 else if (pid > machine->pid)
221 default_machine = machine;
224 return default_machine;
227 struct machine *machines__findnew(struct machines *machines, pid_t pid)
230 const char *root_dir = "";
231 struct machine *machine = machines__find(machines, pid);
233 if (machine && (machine->pid == pid))
236 if ((pid != HOST_KERNEL_ID) &&
237 (pid != DEFAULT_GUEST_KERNEL_ID) &&
238 (symbol_conf.guestmount)) {
239 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
240 if (access(path, R_OK)) {
241 static struct strlist *seen;
244 seen = strlist__new(NULL, NULL);
246 if (!strlist__has_entry(seen, path)) {
247 pr_err("Can't access file %s\n", path);
248 strlist__add(seen, path);
256 machine = machines__add(machines, pid, root_dir);
261 void machines__process_guests(struct machines *machines,
262 machine__process_t process, void *data)
266 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
267 struct machine *pos = rb_entry(nd, struct machine, rb_node);
272 char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
274 if (machine__is_host(machine))
275 snprintf(bf, size, "[%s]", "kernel.kallsyms");
276 else if (machine__is_default_guest(machine))
277 snprintf(bf, size, "[%s]", "guest.kernel.kallsyms");
279 snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms",
286 void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
288 struct rb_node *node;
289 struct machine *machine;
291 machines->host.id_hdr_size = id_hdr_size;
293 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
294 machine = rb_entry(node, struct machine, rb_node);
295 machine->id_hdr_size = id_hdr_size;
301 static void machine__update_thread_pid(struct machine *machine,
302 struct thread *th, pid_t pid)
304 struct thread *leader;
306 if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
311 if (th->pid_ == th->tid)
314 leader = __machine__findnew_thread(machine, th->pid_, th->pid_);
319 leader->mg = map_groups__new(machine);
324 if (th->mg == leader->mg)
329 * Maps are created from MMAP events which provide the pid and
330 * tid. Consequently there never should be any maps on a thread
331 * with an unknown pid. Just print an error if there are.
333 if (!map_groups__empty(th->mg))
334 pr_err("Discarding thread maps for %d:%d\n",
336 map_groups__put(th->mg);
339 th->mg = map_groups__get(leader->mg);
344 pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
349 * Caller must eventually drop thread->refcnt returned with a successful
350 * lookup/new thread inserted.
352 static struct thread *____machine__findnew_thread(struct machine *machine,
353 pid_t pid, pid_t tid,
356 struct rb_node **p = &machine->threads.rb_node;
357 struct rb_node *parent = NULL;
361 * Front-end cache - TID lookups come in blocks,
362 * so most of the time we dont have to look up
365 th = machine->last_match;
367 if (th->tid == tid) {
368 machine__update_thread_pid(machine, th, pid);
369 return thread__get(th);
372 machine->last_match = NULL;
377 th = rb_entry(parent, struct thread, rb_node);
379 if (th->tid == tid) {
380 machine->last_match = th;
381 machine__update_thread_pid(machine, th, pid);
382 return thread__get(th);
394 th = thread__new(pid, tid);
396 rb_link_node(&th->rb_node, parent, p);
397 rb_insert_color(&th->rb_node, &machine->threads);
400 * We have to initialize map_groups separately
401 * after rb tree is updated.
403 * The reason is that we call machine__findnew_thread
404 * within thread__init_map_groups to find the thread
405 * leader and that would screwed the rb tree.
407 if (thread__init_map_groups(th, machine)) {
408 rb_erase_init(&th->rb_node, &machine->threads);
409 RB_CLEAR_NODE(&th->rb_node);
414 * It is now in the rbtree, get a ref
417 machine->last_match = th;
418 ++machine->nr_threads;
424 struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid)
426 return ____machine__findnew_thread(machine, pid, tid, true);
429 struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
434 pthread_rwlock_wrlock(&machine->threads_lock);
435 th = __machine__findnew_thread(machine, pid, tid);
436 pthread_rwlock_unlock(&machine->threads_lock);
440 struct thread *machine__find_thread(struct machine *machine, pid_t pid,
444 pthread_rwlock_rdlock(&machine->threads_lock);
445 th = ____machine__findnew_thread(machine, pid, tid, false);
446 pthread_rwlock_unlock(&machine->threads_lock);
450 struct comm *machine__thread_exec_comm(struct machine *machine,
451 struct thread *thread)
453 if (machine->comm_exec)
454 return thread__exec_comm(thread);
456 return thread__comm(thread);
459 int machine__process_comm_event(struct machine *machine, union perf_event *event,
460 struct perf_sample *sample)
462 struct thread *thread = machine__findnew_thread(machine,
465 bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
469 machine->comm_exec = true;
472 perf_event__fprintf_comm(event, stdout);
474 if (thread == NULL ||
475 __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
476 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
485 int machine__process_lost_event(struct machine *machine __maybe_unused,
486 union perf_event *event, struct perf_sample *sample __maybe_unused)
488 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
489 event->lost.id, event->lost.lost);
493 int machine__process_lost_samples_event(struct machine *machine __maybe_unused,
494 union perf_event *event, struct perf_sample *sample)
496 dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n",
497 sample->id, event->lost_samples.lost);
501 static struct dso *machine__findnew_module_dso(struct machine *machine,
503 const char *filename)
507 pthread_rwlock_wrlock(&machine->dsos.lock);
509 dso = __dsos__find(&machine->dsos, m->name, true);
511 dso = __dsos__addnew(&machine->dsos, m->name);
515 if (machine__is_host(machine))
516 dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
518 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
520 /* _KMODULE_COMP should be next to _KMODULE */
521 if (m->kmod && m->comp)
524 dso__set_short_name(dso, strdup(m->name), true);
525 dso__set_long_name(dso, strdup(filename), true);
530 pthread_rwlock_unlock(&machine->dsos.lock);
534 int machine__process_aux_event(struct machine *machine __maybe_unused,
535 union perf_event *event)
538 perf_event__fprintf_aux(event, stdout);
542 int machine__process_itrace_start_event(struct machine *machine __maybe_unused,
543 union perf_event *event)
546 perf_event__fprintf_itrace_start(event, stdout);
550 int machine__process_switch_event(struct machine *machine __maybe_unused,
551 union perf_event *event)
554 perf_event__fprintf_switch(event, stdout);
558 static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename)
560 const char *dup_filename;
562 if (!filename || !dso || !dso->long_name)
564 if (dso->long_name[0] != '[')
566 if (!strchr(filename, '/'))
569 dup_filename = strdup(filename);
573 dso__set_long_name(dso, dup_filename, true);
576 struct map *machine__findnew_module_map(struct machine *machine, u64 start,
577 const char *filename)
579 struct map *map = NULL;
580 struct dso *dso = NULL;
583 if (kmod_path__parse_name(&m, filename))
586 map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION,
590 * If the map's dso is an offline module, give dso__load()
591 * a chance to find the file path of that module by fixing
594 dso__adjust_kmod_long_name(map->dso, filename);
598 dso = machine__findnew_module_dso(machine, &m, filename);
602 map = map__new2(start, dso, MAP__FUNCTION);
606 map_groups__insert(&machine->kmaps, map);
608 /* Put the map here because map_groups__insert alread got it */
611 /* put the dso here, corresponding to machine__findnew_module_dso */
617 size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
620 size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp);
622 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
623 struct machine *pos = rb_entry(nd, struct machine, rb_node);
624 ret += __dsos__fprintf(&pos->dsos.head, fp);
630 size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
631 bool (skip)(struct dso *dso, int parm), int parm)
633 return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm);
636 size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
637 bool (skip)(struct dso *dso, int parm), int parm)
640 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
642 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
643 struct machine *pos = rb_entry(nd, struct machine, rb_node);
644 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
649 size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
653 struct dso *kdso = machine__kernel_map(machine)->dso;
655 if (kdso->has_build_id) {
656 char filename[PATH_MAX];
657 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
658 printed += fprintf(fp, "[0] %s\n", filename);
661 for (i = 0; i < vmlinux_path__nr_entries; ++i)
662 printed += fprintf(fp, "[%d] %s\n",
663 i + kdso->has_build_id, vmlinux_path[i]);
668 size_t machine__fprintf(struct machine *machine, FILE *fp)
673 pthread_rwlock_rdlock(&machine->threads_lock);
675 ret = fprintf(fp, "Threads: %u\n", machine->nr_threads);
677 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
678 struct thread *pos = rb_entry(nd, struct thread, rb_node);
680 ret += thread__fprintf(pos, fp);
683 pthread_rwlock_unlock(&machine->threads_lock);
688 static struct dso *machine__get_kernel(struct machine *machine)
690 const char *vmlinux_name = NULL;
693 if (machine__is_host(machine)) {
694 vmlinux_name = symbol_conf.vmlinux_name;
696 vmlinux_name = DSO__NAME_KALLSYMS;
698 kernel = machine__findnew_kernel(machine, vmlinux_name,
699 "[kernel]", DSO_TYPE_KERNEL);
703 if (machine__is_default_guest(machine))
704 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
706 vmlinux_name = machine__mmap_name(machine, bf,
709 kernel = machine__findnew_kernel(machine, vmlinux_name,
711 DSO_TYPE_GUEST_KERNEL);
714 if (kernel != NULL && (!kernel->has_build_id))
715 dso__read_running_kernel_build_id(kernel, machine);
720 struct process_args {
724 static void machine__get_kallsyms_filename(struct machine *machine, char *buf,
727 if (machine__is_default_guest(machine))
728 scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
730 scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
733 const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
735 /* Figure out the start address of kernel map from /proc/kallsyms.
736 * Returns the name of the start symbol in *symbol_name. Pass in NULL as
737 * symbol_name if it's not that important.
739 static u64 machine__get_running_kernel_start(struct machine *machine,
740 const char **symbol_name)
742 char filename[PATH_MAX];
747 machine__get_kallsyms_filename(machine, filename, PATH_MAX);
749 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
752 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
753 addr = kallsyms__get_function_start(filename, name);
764 int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
767 u64 start = machine__get_running_kernel_start(machine, NULL);
769 /* In case of renewal the kernel map, destroy previous one */
770 machine__destroy_kernel_maps(machine);
772 for (type = 0; type < MAP__NR_TYPES; ++type) {
776 machine->vmlinux_maps[type] = map__new2(start, kernel, type);
777 if (machine->vmlinux_maps[type] == NULL)
780 machine->vmlinux_maps[type]->map_ip =
781 machine->vmlinux_maps[type]->unmap_ip =
783 map = __machine__kernel_map(machine, type);
784 kmap = map__kmap(map);
788 kmap->kmaps = &machine->kmaps;
789 map_groups__insert(&machine->kmaps, map);
795 void machine__destroy_kernel_maps(struct machine *machine)
799 for (type = 0; type < MAP__NR_TYPES; ++type) {
801 struct map *map = __machine__kernel_map(machine, type);
806 kmap = map__kmap(map);
807 map_groups__remove(&machine->kmaps, map);
808 if (kmap && kmap->ref_reloc_sym) {
810 * ref_reloc_sym is shared among all maps, so free just
813 if (type == MAP__FUNCTION) {
814 zfree((char **)&kmap->ref_reloc_sym->name);
815 zfree(&kmap->ref_reloc_sym);
817 kmap->ref_reloc_sym = NULL;
820 map__put(machine->vmlinux_maps[type]);
821 machine->vmlinux_maps[type] = NULL;
825 int machines__create_guest_kernel_maps(struct machines *machines)
828 struct dirent **namelist = NULL;
834 if (symbol_conf.default_guest_vmlinux_name ||
835 symbol_conf.default_guest_modules ||
836 symbol_conf.default_guest_kallsyms) {
837 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
840 if (symbol_conf.guestmount) {
841 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
844 for (i = 0; i < items; i++) {
845 if (!isdigit(namelist[i]->d_name[0])) {
846 /* Filter out . and .. */
849 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
850 if ((*endp != '\0') ||
851 (endp == namelist[i]->d_name) ||
853 pr_debug("invalid directory (%s). Skipping.\n",
854 namelist[i]->d_name);
857 sprintf(path, "%s/%s/proc/kallsyms",
858 symbol_conf.guestmount,
859 namelist[i]->d_name);
860 ret = access(path, R_OK);
862 pr_debug("Can't access file %s\n", path);
865 machines__create_kernel_maps(machines, pid);
874 void machines__destroy_kernel_maps(struct machines *machines)
876 struct rb_node *next = rb_first(&machines->guests);
878 machine__destroy_kernel_maps(&machines->host);
881 struct machine *pos = rb_entry(next, struct machine, rb_node);
883 next = rb_next(&pos->rb_node);
884 rb_erase(&pos->rb_node, &machines->guests);
885 machine__delete(pos);
889 int machines__create_kernel_maps(struct machines *machines, pid_t pid)
891 struct machine *machine = machines__findnew(machines, pid);
896 return machine__create_kernel_maps(machine);
899 int __machine__load_kallsyms(struct machine *machine, const char *filename,
900 enum map_type type, bool no_kcore)
902 struct map *map = machine__kernel_map(machine);
903 int ret = __dso__load_kallsyms(map->dso, filename, map, no_kcore);
906 dso__set_loaded(map->dso, type);
908 * Since /proc/kallsyms will have multiple sessions for the
909 * kernel, with modules between them, fixup the end of all
912 __map_groups__fixup_end(&machine->kmaps, type);
918 int machine__load_kallsyms(struct machine *machine, const char *filename,
921 return __machine__load_kallsyms(machine, filename, type, false);
924 int machine__load_vmlinux_path(struct machine *machine, enum map_type type)
926 struct map *map = machine__kernel_map(machine);
927 int ret = dso__load_vmlinux_path(map->dso, map);
930 dso__set_loaded(map->dso, type);
935 static void map_groups__fixup_end(struct map_groups *mg)
938 for (i = 0; i < MAP__NR_TYPES; ++i)
939 __map_groups__fixup_end(mg, i);
942 static char *get_kernel_version(const char *root_dir)
944 char version[PATH_MAX];
947 const char *prefix = "Linux version ";
949 sprintf(version, "%s/proc/version", root_dir);
950 file = fopen(version, "r");
955 tmp = fgets(version, sizeof(version), file);
958 name = strstr(version, prefix);
961 name += strlen(prefix);
962 tmp = strchr(name, ' ');
969 static bool is_kmod_dso(struct dso *dso)
971 return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
972 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
975 static int map_groups__set_module_path(struct map_groups *mg, const char *path,
981 map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name);
985 long_name = strdup(path);
986 if (long_name == NULL)
989 dso__set_long_name(map->dso, long_name, true);
990 dso__kernel_module_get_build_id(map->dso, "");
993 * Full name could reveal us kmod compression, so
994 * we need to update the symtab_type if needed.
996 if (m->comp && is_kmod_dso(map->dso))
997 map->dso->symtab_type++;
1002 static int map_groups__set_modules_path_dir(struct map_groups *mg,
1003 const char *dir_name, int depth)
1005 struct dirent *dent;
1006 DIR *dir = opendir(dir_name);
1010 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1014 while ((dent = readdir(dir)) != NULL) {
1015 char path[PATH_MAX];
1018 /*sshfs might return bad dent->d_type, so we have to stat*/
1019 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
1020 if (stat(path, &st))
1023 if (S_ISDIR(st.st_mode)) {
1024 if (!strcmp(dent->d_name, ".") ||
1025 !strcmp(dent->d_name, ".."))
1028 /* Do not follow top-level source and build symlinks */
1030 if (!strcmp(dent->d_name, "source") ||
1031 !strcmp(dent->d_name, "build"))
1035 ret = map_groups__set_modules_path_dir(mg, path,
1042 ret = kmod_path__parse_name(&m, dent->d_name);
1047 ret = map_groups__set_module_path(mg, path, &m);
1061 static int machine__set_modules_path(struct machine *machine)
1064 char modules_path[PATH_MAX];
1066 version = get_kernel_version(machine->root_dir);
1070 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
1071 machine->root_dir, version);
1074 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0);
1076 int __weak arch__fix_module_text_start(u64 *start __maybe_unused,
1077 u64 *size __maybe_unused,
1078 const char *name __maybe_unused)
1083 static int machine__create_module(void *arg, const char *name, u64 start,
1086 struct machine *machine = arg;
1089 if (arch__fix_module_text_start(&start, &size, name) < 0)
1092 map = machine__findnew_module_map(machine, start, name);
1095 map->end = start + size;
1097 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
1102 static int machine__create_modules(struct machine *machine)
1104 const char *modules;
1105 char path[PATH_MAX];
1107 if (machine__is_default_guest(machine)) {
1108 modules = symbol_conf.default_guest_modules;
1110 snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
1114 if (symbol__restricted_filename(modules, "/proc/modules"))
1117 if (modules__parse(modules, machine, machine__create_module))
1120 if (!machine__set_modules_path(machine))
1123 pr_debug("Problems setting modules path maps, continuing anyway...\n");
1128 int machine__create_kernel_maps(struct machine *machine)
1130 struct dso *kernel = machine__get_kernel(machine);
1138 ret = __machine__create_kernel_maps(machine, kernel);
1143 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
1144 if (machine__is_host(machine))
1145 pr_debug("Problems creating module maps, "
1146 "continuing anyway...\n");
1148 pr_debug("Problems creating module maps for guest %d, "
1149 "continuing anyway...\n", machine->pid);
1153 * Now that we have all the maps created, just set the ->end of them:
1155 map_groups__fixup_end(&machine->kmaps);
1157 addr = machine__get_running_kernel_start(machine, &name);
1159 } else if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, addr)) {
1160 machine__destroy_kernel_maps(machine);
1167 static void machine__set_kernel_mmap_len(struct machine *machine,
1168 union perf_event *event)
1172 for (i = 0; i < MAP__NR_TYPES; i++) {
1173 machine->vmlinux_maps[i]->start = event->mmap.start;
1174 machine->vmlinux_maps[i]->end = (event->mmap.start +
1177 * Be a bit paranoid here, some perf.data file came with
1178 * a zero sized synthesized MMAP event for the kernel.
1180 if (machine->vmlinux_maps[i]->end == 0)
1181 machine->vmlinux_maps[i]->end = ~0ULL;
1185 static bool machine__uses_kcore(struct machine *machine)
1189 list_for_each_entry(dso, &machine->dsos.head, node) {
1190 if (dso__is_kcore(dso))
1197 static int machine__process_kernel_mmap_event(struct machine *machine,
1198 union perf_event *event)
1201 char kmmap_prefix[PATH_MAX];
1202 enum dso_kernel_type kernel_type;
1203 bool is_kernel_mmap;
1205 /* If we have maps from kcore then we do not need or want any others */
1206 if (machine__uses_kcore(machine))
1209 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
1210 if (machine__is_host(machine))
1211 kernel_type = DSO_TYPE_KERNEL;
1213 kernel_type = DSO_TYPE_GUEST_KERNEL;
1215 is_kernel_mmap = memcmp(event->mmap.filename,
1217 strlen(kmmap_prefix) - 1) == 0;
1218 if (event->mmap.filename[0] == '/' ||
1219 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
1220 map = machine__findnew_module_map(machine, event->mmap.start,
1221 event->mmap.filename);
1225 map->end = map->start + event->mmap.len;
1226 } else if (is_kernel_mmap) {
1227 const char *symbol_name = (event->mmap.filename +
1228 strlen(kmmap_prefix));
1230 * Should be there already, from the build-id table in
1233 struct dso *kernel = NULL;
1236 pthread_rwlock_rdlock(&machine->dsos.lock);
1238 list_for_each_entry(dso, &machine->dsos.head, node) {
1241 * The cpumode passed to is_kernel_module is not the
1242 * cpumode of *this* event. If we insist on passing
1243 * correct cpumode to is_kernel_module, we should
1244 * record the cpumode when we adding this dso to the
1247 * However we don't really need passing correct
1248 * cpumode. We know the correct cpumode must be kernel
1249 * mode (if not, we should not link it onto kernel_dsos
1252 * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN.
1253 * is_kernel_module() treats it as a kernel cpumode.
1257 is_kernel_module(dso->long_name,
1258 PERF_RECORD_MISC_CPUMODE_UNKNOWN))
1266 pthread_rwlock_unlock(&machine->dsos.lock);
1269 kernel = machine__findnew_dso(machine, kmmap_prefix);
1273 kernel->kernel = kernel_type;
1274 if (__machine__create_kernel_maps(machine, kernel) < 0) {
1279 if (strstr(kernel->long_name, "vmlinux"))
1280 dso__set_short_name(kernel, "[kernel.vmlinux]", false);
1282 machine__set_kernel_mmap_len(machine, event);
1285 * Avoid using a zero address (kptr_restrict) for the ref reloc
1286 * symbol. Effectively having zero here means that at record
1287 * time /proc/sys/kernel/kptr_restrict was non zero.
1289 if (event->mmap.pgoff != 0) {
1290 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
1295 if (machine__is_default_guest(machine)) {
1297 * preload dso of guest kernel and modules
1299 dso__load(kernel, machine__kernel_map(machine));
1307 int machine__process_mmap2_event(struct machine *machine,
1308 union perf_event *event,
1309 struct perf_sample *sample)
1311 struct thread *thread;
1317 perf_event__fprintf_mmap2(event, stdout);
1319 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1320 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1321 ret = machine__process_kernel_mmap_event(machine, event);
1327 thread = machine__findnew_thread(machine, event->mmap2.pid,
1332 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1333 type = MAP__VARIABLE;
1335 type = MAP__FUNCTION;
1337 map = map__new(machine, event->mmap2.start,
1338 event->mmap2.len, event->mmap2.pgoff,
1339 event->mmap2.pid, event->mmap2.maj,
1340 event->mmap2.min, event->mmap2.ino,
1341 event->mmap2.ino_generation,
1344 event->mmap2.filename, type, thread);
1347 goto out_problem_map;
1349 ret = thread__insert_map(thread, map);
1351 goto out_problem_insert;
1353 thread__put(thread);
1360 thread__put(thread);
1362 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1366 int machine__process_mmap_event(struct machine *machine, union perf_event *event,
1367 struct perf_sample *sample)
1369 struct thread *thread;
1375 perf_event__fprintf_mmap(event, stdout);
1377 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1378 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1379 ret = machine__process_kernel_mmap_event(machine, event);
1385 thread = machine__findnew_thread(machine, event->mmap.pid,
1390 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1391 type = MAP__VARIABLE;
1393 type = MAP__FUNCTION;
1395 map = map__new(machine, event->mmap.start,
1396 event->mmap.len, event->mmap.pgoff,
1397 event->mmap.pid, 0, 0, 0, 0, 0, 0,
1398 event->mmap.filename,
1402 goto out_problem_map;
1404 ret = thread__insert_map(thread, map);
1406 goto out_problem_insert;
1408 thread__put(thread);
1415 thread__put(thread);
1417 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1421 static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock)
1423 if (machine->last_match == th)
1424 machine->last_match = NULL;
1426 BUG_ON(atomic_read(&th->refcnt) == 0);
1428 pthread_rwlock_wrlock(&machine->threads_lock);
1429 rb_erase_init(&th->rb_node, &machine->threads);
1430 RB_CLEAR_NODE(&th->rb_node);
1431 --machine->nr_threads;
1433 * Move it first to the dead_threads list, then drop the reference,
1434 * if this is the last reference, then the thread__delete destructor
1435 * will be called and we will remove it from the dead_threads list.
1437 list_add_tail(&th->node, &machine->dead_threads);
1439 pthread_rwlock_unlock(&machine->threads_lock);
1443 void machine__remove_thread(struct machine *machine, struct thread *th)
1445 return __machine__remove_thread(machine, th, true);
1448 int machine__process_fork_event(struct machine *machine, union perf_event *event,
1449 struct perf_sample *sample)
1451 struct thread *thread = machine__find_thread(machine,
1454 struct thread *parent = machine__findnew_thread(machine,
1460 perf_event__fprintf_task(event, stdout);
1463 * There may be an existing thread that is not actually the parent,
1464 * either because we are processing events out of order, or because the
1465 * (fork) event that would have removed the thread was lost. Assume the
1466 * latter case and continue on as best we can.
1468 if (parent->pid_ != (pid_t)event->fork.ppid) {
1469 dump_printf("removing erroneous parent thread %d/%d\n",
1470 parent->pid_, parent->tid);
1471 machine__remove_thread(machine, parent);
1472 thread__put(parent);
1473 parent = machine__findnew_thread(machine, event->fork.ppid,
1477 /* if a thread currently exists for the thread id remove it */
1478 if (thread != NULL) {
1479 machine__remove_thread(machine, thread);
1480 thread__put(thread);
1483 thread = machine__findnew_thread(machine, event->fork.pid,
1486 if (thread == NULL || parent == NULL ||
1487 thread__fork(thread, parent, sample->time) < 0) {
1488 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1491 thread__put(thread);
1492 thread__put(parent);
1497 int machine__process_exit_event(struct machine *machine, union perf_event *event,
1498 struct perf_sample *sample __maybe_unused)
1500 struct thread *thread = machine__find_thread(machine,
1505 perf_event__fprintf_task(event, stdout);
1507 if (thread != NULL) {
1508 thread__exited(thread);
1509 thread__put(thread);
1515 int machine__process_event(struct machine *machine, union perf_event *event,
1516 struct perf_sample *sample)
1520 switch (event->header.type) {
1521 case PERF_RECORD_COMM:
1522 ret = machine__process_comm_event(machine, event, sample); break;
1523 case PERF_RECORD_MMAP:
1524 ret = machine__process_mmap_event(machine, event, sample); break;
1525 case PERF_RECORD_MMAP2:
1526 ret = machine__process_mmap2_event(machine, event, sample); break;
1527 case PERF_RECORD_FORK:
1528 ret = machine__process_fork_event(machine, event, sample); break;
1529 case PERF_RECORD_EXIT:
1530 ret = machine__process_exit_event(machine, event, sample); break;
1531 case PERF_RECORD_LOST:
1532 ret = machine__process_lost_event(machine, event, sample); break;
1533 case PERF_RECORD_AUX:
1534 ret = machine__process_aux_event(machine, event); break;
1535 case PERF_RECORD_ITRACE_START:
1536 ret = machine__process_itrace_start_event(machine, event); break;
1537 case PERF_RECORD_LOST_SAMPLES:
1538 ret = machine__process_lost_samples_event(machine, event, sample); break;
1539 case PERF_RECORD_SWITCH:
1540 case PERF_RECORD_SWITCH_CPU_WIDE:
1541 ret = machine__process_switch_event(machine, event); break;
1550 static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
1552 if (sym->name && !regexec(regex, sym->name, 0, NULL, 0))
1557 static void ip__resolve_ams(struct thread *thread,
1558 struct addr_map_symbol *ams,
1561 struct addr_location al;
1563 memset(&al, 0, sizeof(al));
1565 * We cannot use the header.misc hint to determine whether a
1566 * branch stack address is user, kernel, guest, hypervisor.
1567 * Branches may straddle the kernel/user/hypervisor boundaries.
1568 * Thus, we have to try consecutively until we find a match
1569 * or else, the symbol is unknown
1571 thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al);
1574 ams->al_addr = al.addr;
1579 static void ip__resolve_data(struct thread *thread,
1580 u8 m, struct addr_map_symbol *ams, u64 addr)
1582 struct addr_location al;
1584 memset(&al, 0, sizeof(al));
1586 thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al);
1587 if (al.map == NULL) {
1589 * some shared data regions have execute bit set which puts
1590 * their mapping in the MAP__FUNCTION type array.
1591 * Check there as a fallback option before dropping the sample.
1593 thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al);
1597 ams->al_addr = al.addr;
1602 struct mem_info *sample__resolve_mem(struct perf_sample *sample,
1603 struct addr_location *al)
1605 struct mem_info *mi = zalloc(sizeof(*mi));
1610 ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
1611 ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr);
1612 mi->data_src.val = sample->data_src;
1617 static int add_callchain_ip(struct thread *thread,
1618 struct callchain_cursor *cursor,
1619 struct symbol **parent,
1620 struct addr_location *root_al,
1624 struct addr_location al;
1629 thread__find_cpumode_addr_location(thread, MAP__FUNCTION,
1632 if (ip >= PERF_CONTEXT_MAX) {
1634 case PERF_CONTEXT_HV:
1635 *cpumode = PERF_RECORD_MISC_HYPERVISOR;
1637 case PERF_CONTEXT_KERNEL:
1638 *cpumode = PERF_RECORD_MISC_KERNEL;
1640 case PERF_CONTEXT_USER:
1641 *cpumode = PERF_RECORD_MISC_USER;
1644 pr_debug("invalid callchain context: "
1645 "%"PRId64"\n", (s64) ip);
1647 * It seems the callchain is corrupted.
1650 callchain_cursor_reset(cursor);
1655 thread__find_addr_location(thread, *cpumode, MAP__FUNCTION,
1659 if (al.sym != NULL) {
1660 if (perf_hpp_list.parent && !*parent &&
1661 symbol__match_regex(al.sym, &parent_regex))
1663 else if (have_ignore_callees && root_al &&
1664 symbol__match_regex(al.sym, &ignore_callees_regex)) {
1665 /* Treat this symbol as the root,
1666 forgetting its callees. */
1668 callchain_cursor_reset(cursor);
1672 if (symbol_conf.hide_unresolved && al.sym == NULL)
1674 return callchain_cursor_append(cursor, al.addr, al.map, al.sym);
1677 struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
1678 struct addr_location *al)
1681 const struct branch_stack *bs = sample->branch_stack;
1682 struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
1687 for (i = 0; i < bs->nr; i++) {
1688 ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
1689 ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
1690 bi[i].flags = bs->entries[i].flags;
1697 #define NO_ENTRY 0xff
1699 #define PERF_MAX_BRANCH_DEPTH 127
1702 static int remove_loops(struct branch_entry *l, int nr)
1705 unsigned char chash[CHASHSZ];
1707 memset(chash, NO_ENTRY, sizeof(chash));
1709 BUG_ON(PERF_MAX_BRANCH_DEPTH > 255);
1711 for (i = 0; i < nr; i++) {
1712 int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ;
1714 /* no collision handling for now */
1715 if (chash[h] == NO_ENTRY) {
1717 } else if (l[chash[h]].from == l[i].from) {
1718 bool is_loop = true;
1719 /* check if it is a real loop */
1721 for (j = chash[h]; j < i && i + off < nr; j++, off++)
1722 if (l[j].from != l[i + off].from) {
1727 memmove(l + i, l + i + off,
1728 (nr - (i + off)) * sizeof(*l));
1737 * Recolve LBR callstack chain sample
1739 * 1 on success get LBR callchain information
1740 * 0 no available LBR callchain information, should try fp
1741 * negative error code on other errors.
1743 static int resolve_lbr_callchain_sample(struct thread *thread,
1744 struct callchain_cursor *cursor,
1745 struct perf_sample *sample,
1746 struct symbol **parent,
1747 struct addr_location *root_al,
1750 struct ip_callchain *chain = sample->callchain;
1751 int chain_nr = min(max_stack, (int)chain->nr), i;
1752 u8 cpumode = PERF_RECORD_MISC_USER;
1755 for (i = 0; i < chain_nr; i++) {
1756 if (chain->ips[i] == PERF_CONTEXT_USER)
1760 /* LBR only affects the user callchain */
1761 if (i != chain_nr) {
1762 struct branch_stack *lbr_stack = sample->branch_stack;
1763 int lbr_nr = lbr_stack->nr, j;
1765 * LBR callstack can only get user call chain.
1766 * The mix_chain_nr is kernel call chain
1767 * number plus LBR user call chain number.
1768 * i is kernel call chain number,
1769 * 1 is PERF_CONTEXT_USER,
1770 * lbr_nr + 1 is the user call chain number.
1771 * For details, please refer to the comments
1772 * in callchain__printf
1774 int mix_chain_nr = i + 1 + lbr_nr + 1;
1776 for (j = 0; j < mix_chain_nr; j++) {
1778 if (callchain_param.order == ORDER_CALLEE) {
1782 ip = lbr_stack->entries[j - i - 2].from;
1784 ip = lbr_stack->entries[0].to;
1787 ip = lbr_stack->entries[lbr_nr - j - 1].from;
1788 else if (j > lbr_nr)
1789 ip = chain->ips[i + 1 - (j - lbr_nr)];
1791 ip = lbr_stack->entries[0].to;
1794 err = add_callchain_ip(thread, cursor, parent, root_al, &cpumode, ip);
1796 return (err < 0) ? err : 0;
1804 static int thread__resolve_callchain_sample(struct thread *thread,
1805 struct callchain_cursor *cursor,
1806 struct perf_evsel *evsel,
1807 struct perf_sample *sample,
1808 struct symbol **parent,
1809 struct addr_location *root_al,
1812 struct branch_stack *branch = sample->branch_stack;
1813 struct ip_callchain *chain = sample->callchain;
1814 int chain_nr = chain->nr;
1815 u8 cpumode = PERF_RECORD_MISC_USER;
1816 int i, j, err, nr_entries;
1820 if (perf_evsel__has_branch_callstack(evsel)) {
1821 err = resolve_lbr_callchain_sample(thread, cursor, sample, parent,
1822 root_al, max_stack);
1824 return (err < 0) ? err : 0;
1828 * Based on DWARF debug information, some architectures skip
1829 * a callchain entry saved by the kernel.
1831 skip_idx = arch_skip_callchain_idx(thread, chain);
1834 * Add branches to call stack for easier browsing. This gives
1835 * more context for a sample than just the callers.
1837 * This uses individual histograms of paths compared to the
1838 * aggregated histograms the normal LBR mode uses.
1840 * Limitations for now:
1841 * - No extra filters
1842 * - No annotations (should annotate somehow)
1845 if (branch && callchain_param.branch_callstack) {
1846 int nr = min(max_stack, (int)branch->nr);
1847 struct branch_entry be[nr];
1849 if (branch->nr > PERF_MAX_BRANCH_DEPTH) {
1850 pr_warning("corrupted branch chain. skipping...\n");
1854 for (i = 0; i < nr; i++) {
1855 if (callchain_param.order == ORDER_CALLEE) {
1856 be[i] = branch->entries[i];
1858 * Check for overlap into the callchain.
1859 * The return address is one off compared to
1860 * the branch entry. To adjust for this
1861 * assume the calling instruction is not longer
1864 if (i == skip_idx ||
1865 chain->ips[first_call] >= PERF_CONTEXT_MAX)
1867 else if (be[i].from < chain->ips[first_call] &&
1868 be[i].from >= chain->ips[first_call] - 8)
1871 be[i] = branch->entries[branch->nr - i - 1];
1874 nr = remove_loops(be, nr);
1876 for (i = 0; i < nr; i++) {
1877 err = add_callchain_ip(thread, cursor, parent, root_al,
1880 err = add_callchain_ip(thread, cursor, parent, root_al,
1891 for (i = first_call, nr_entries = 0;
1892 i < chain_nr && nr_entries < max_stack; i++) {
1895 if (callchain_param.order == ORDER_CALLEE)
1898 j = chain->nr - i - 1;
1900 #ifdef HAVE_SKIP_CALLCHAIN_IDX
1906 if (ip < PERF_CONTEXT_MAX)
1909 err = add_callchain_ip(thread, cursor, parent, root_al, &cpumode, ip);
1912 return (err < 0) ? err : 0;
1918 static int unwind_entry(struct unwind_entry *entry, void *arg)
1920 struct callchain_cursor *cursor = arg;
1922 if (symbol_conf.hide_unresolved && entry->sym == NULL)
1924 return callchain_cursor_append(cursor, entry->ip,
1925 entry->map, entry->sym);
1928 static int thread__resolve_callchain_unwind(struct thread *thread,
1929 struct callchain_cursor *cursor,
1930 struct perf_evsel *evsel,
1931 struct perf_sample *sample,
1934 /* Can we do dwarf post unwind? */
1935 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
1936 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
1939 /* Bail out if nothing was captured. */
1940 if ((!sample->user_regs.regs) ||
1941 (!sample->user_stack.size))
1944 return unwind__get_entries(unwind_entry, cursor,
1945 thread, sample, max_stack);
1948 int thread__resolve_callchain(struct thread *thread,
1949 struct callchain_cursor *cursor,
1950 struct perf_evsel *evsel,
1951 struct perf_sample *sample,
1952 struct symbol **parent,
1953 struct addr_location *root_al,
1958 callchain_cursor_reset(&callchain_cursor);
1960 if (callchain_param.order == ORDER_CALLEE) {
1961 ret = thread__resolve_callchain_sample(thread, cursor,
1967 ret = thread__resolve_callchain_unwind(thread, cursor,
1971 ret = thread__resolve_callchain_unwind(thread, cursor,
1976 ret = thread__resolve_callchain_sample(thread, cursor,
1985 int machine__for_each_thread(struct machine *machine,
1986 int (*fn)(struct thread *thread, void *p),
1990 struct thread *thread;
1993 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
1994 thread = rb_entry(nd, struct thread, rb_node);
1995 rc = fn(thread, priv);
2000 list_for_each_entry(thread, &machine->dead_threads, node) {
2001 rc = fn(thread, priv);
2008 int machines__for_each_thread(struct machines *machines,
2009 int (*fn)(struct thread *thread, void *p),
2015 rc = machine__for_each_thread(&machines->host, fn, priv);
2019 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
2020 struct machine *machine = rb_entry(nd, struct machine, rb_node);
2022 rc = machine__for_each_thread(machine, fn, priv);
2029 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
2030 struct target *target, struct thread_map *threads,
2031 perf_event__handler_t process, bool data_mmap,
2032 unsigned int proc_map_timeout)
2034 if (target__has_task(target))
2035 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap, proc_map_timeout);
2036 else if (target__has_cpu(target))
2037 return perf_event__synthesize_threads(tool, process, machine, data_mmap, proc_map_timeout);
2038 /* command specified */
2042 pid_t machine__get_current_tid(struct machine *machine, int cpu)
2044 if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid)
2047 return machine->current_tid[cpu];
2050 int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
2053 struct thread *thread;
2058 if (!machine->current_tid) {
2061 machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t));
2062 if (!machine->current_tid)
2064 for (i = 0; i < MAX_NR_CPUS; i++)
2065 machine->current_tid[i] = -1;
2068 if (cpu >= MAX_NR_CPUS) {
2069 pr_err("Requested CPU %d too large. ", cpu);
2070 pr_err("Consider raising MAX_NR_CPUS\n");
2074 machine->current_tid[cpu] = tid;
2076 thread = machine__findnew_thread(machine, pid, tid);
2081 thread__put(thread);
2086 int machine__get_kernel_start(struct machine *machine)
2088 struct map *map = machine__kernel_map(machine);
2092 * The only addresses above 2^63 are kernel addresses of a 64-bit
2093 * kernel. Note that addresses are unsigned so that on a 32-bit system
2094 * all addresses including kernel addresses are less than 2^32. In
2095 * that case (32-bit system), if the kernel mapping is unknown, all
2096 * addresses will be assumed to be in user space - see
2097 * machine__kernel_ip().
2099 machine->kernel_start = 1ULL << 63;
2101 err = map__load(map);
2103 machine->kernel_start = map->start;
2108 struct dso *machine__findnew_dso(struct machine *machine, const char *filename)
2110 return dsos__findnew(&machine->dsos, filename);
2113 char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
2115 struct machine *machine = vmachine;
2117 struct symbol *sym = map_groups__find_symbol(&machine->kmaps, MAP__FUNCTION, *addrp, &map);
2122 *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL;
2123 *addrp = map->unmap_ip(map, sym->start);