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 struct machine *machine__new_kallsyms(void)
92 struct machine *machine = machine__new_host();
95 * 1) MAP__FUNCTION will go away when we stop loading separate maps for
96 * functions and data objects.
97 * 2) We should switch to machine__load_kallsyms(), i.e. not explicitely
98 * ask for not using the kcore parsing code, once this one is fixed
99 * to create a map per module.
101 if (machine && __machine__load_kallsyms(machine, "/proc/kallsyms", MAP__FUNCTION, true) <= 0) {
102 machine__delete(machine);
109 static void dsos__purge(struct dsos *dsos)
113 pthread_rwlock_wrlock(&dsos->lock);
115 list_for_each_entry_safe(pos, n, &dsos->head, node) {
116 RB_CLEAR_NODE(&pos->rb_node);
118 list_del_init(&pos->node);
122 pthread_rwlock_unlock(&dsos->lock);
125 static void dsos__exit(struct dsos *dsos)
128 pthread_rwlock_destroy(&dsos->lock);
131 void machine__delete_threads(struct machine *machine)
135 pthread_rwlock_wrlock(&machine->threads_lock);
136 nd = rb_first(&machine->threads);
138 struct thread *t = rb_entry(nd, struct thread, rb_node);
141 __machine__remove_thread(machine, t, false);
143 pthread_rwlock_unlock(&machine->threads_lock);
146 void machine__exit(struct machine *machine)
148 machine__destroy_kernel_maps(machine);
149 map_groups__exit(&machine->kmaps);
150 dsos__exit(&machine->dsos);
151 machine__exit_vdso(machine);
152 zfree(&machine->root_dir);
153 zfree(&machine->current_tid);
154 pthread_rwlock_destroy(&machine->threads_lock);
157 void machine__delete(struct machine *machine)
160 machine__exit(machine);
165 void machines__init(struct machines *machines)
167 machine__init(&machines->host, "", HOST_KERNEL_ID);
168 machines->guests = RB_ROOT;
171 void machines__exit(struct machines *machines)
173 machine__exit(&machines->host);
177 struct machine *machines__add(struct machines *machines, pid_t pid,
178 const char *root_dir)
180 struct rb_node **p = &machines->guests.rb_node;
181 struct rb_node *parent = NULL;
182 struct machine *pos, *machine = malloc(sizeof(*machine));
187 if (machine__init(machine, root_dir, pid) != 0) {
194 pos = rb_entry(parent, struct machine, rb_node);
201 rb_link_node(&machine->rb_node, parent, p);
202 rb_insert_color(&machine->rb_node, &machines->guests);
207 void machines__set_comm_exec(struct machines *machines, bool comm_exec)
211 machines->host.comm_exec = comm_exec;
213 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
214 struct machine *machine = rb_entry(nd, struct machine, rb_node);
216 machine->comm_exec = comm_exec;
220 struct machine *machines__find(struct machines *machines, pid_t pid)
222 struct rb_node **p = &machines->guests.rb_node;
223 struct rb_node *parent = NULL;
224 struct machine *machine;
225 struct machine *default_machine = NULL;
227 if (pid == HOST_KERNEL_ID)
228 return &machines->host;
232 machine = rb_entry(parent, struct machine, rb_node);
233 if (pid < machine->pid)
235 else if (pid > machine->pid)
240 default_machine = machine;
243 return default_machine;
246 struct machine *machines__findnew(struct machines *machines, pid_t pid)
249 const char *root_dir = "";
250 struct machine *machine = machines__find(machines, pid);
252 if (machine && (machine->pid == pid))
255 if ((pid != HOST_KERNEL_ID) &&
256 (pid != DEFAULT_GUEST_KERNEL_ID) &&
257 (symbol_conf.guestmount)) {
258 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
259 if (access(path, R_OK)) {
260 static struct strlist *seen;
263 seen = strlist__new(NULL, NULL);
265 if (!strlist__has_entry(seen, path)) {
266 pr_err("Can't access file %s\n", path);
267 strlist__add(seen, path);
275 machine = machines__add(machines, pid, root_dir);
280 void machines__process_guests(struct machines *machines,
281 machine__process_t process, void *data)
285 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
286 struct machine *pos = rb_entry(nd, struct machine, rb_node);
291 char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
293 if (machine__is_host(machine))
294 snprintf(bf, size, "[%s]", "kernel.kallsyms");
295 else if (machine__is_default_guest(machine))
296 snprintf(bf, size, "[%s]", "guest.kernel.kallsyms");
298 snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms",
305 void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
307 struct rb_node *node;
308 struct machine *machine;
310 machines->host.id_hdr_size = id_hdr_size;
312 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
313 machine = rb_entry(node, struct machine, rb_node);
314 machine->id_hdr_size = id_hdr_size;
320 static void machine__update_thread_pid(struct machine *machine,
321 struct thread *th, pid_t pid)
323 struct thread *leader;
325 if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
330 if (th->pid_ == th->tid)
333 leader = __machine__findnew_thread(machine, th->pid_, th->pid_);
338 leader->mg = map_groups__new(machine);
343 if (th->mg == leader->mg)
348 * Maps are created from MMAP events which provide the pid and
349 * tid. Consequently there never should be any maps on a thread
350 * with an unknown pid. Just print an error if there are.
352 if (!map_groups__empty(th->mg))
353 pr_err("Discarding thread maps for %d:%d\n",
355 map_groups__put(th->mg);
358 th->mg = map_groups__get(leader->mg);
363 pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
368 * Caller must eventually drop thread->refcnt returned with a successful
369 * lookup/new thread inserted.
371 static struct thread *____machine__findnew_thread(struct machine *machine,
372 pid_t pid, pid_t tid,
375 struct rb_node **p = &machine->threads.rb_node;
376 struct rb_node *parent = NULL;
380 * Front-end cache - TID lookups come in blocks,
381 * so most of the time we dont have to look up
384 th = machine->last_match;
386 if (th->tid == tid) {
387 machine__update_thread_pid(machine, th, pid);
388 return thread__get(th);
391 machine->last_match = NULL;
396 th = rb_entry(parent, struct thread, rb_node);
398 if (th->tid == tid) {
399 machine->last_match = th;
400 machine__update_thread_pid(machine, th, pid);
401 return thread__get(th);
413 th = thread__new(pid, tid);
415 rb_link_node(&th->rb_node, parent, p);
416 rb_insert_color(&th->rb_node, &machine->threads);
419 * We have to initialize map_groups separately
420 * after rb tree is updated.
422 * The reason is that we call machine__findnew_thread
423 * within thread__init_map_groups to find the thread
424 * leader and that would screwed the rb tree.
426 if (thread__init_map_groups(th, machine)) {
427 rb_erase_init(&th->rb_node, &machine->threads);
428 RB_CLEAR_NODE(&th->rb_node);
433 * It is now in the rbtree, get a ref
436 machine->last_match = th;
437 ++machine->nr_threads;
443 struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid)
445 return ____machine__findnew_thread(machine, pid, tid, true);
448 struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
453 pthread_rwlock_wrlock(&machine->threads_lock);
454 th = __machine__findnew_thread(machine, pid, tid);
455 pthread_rwlock_unlock(&machine->threads_lock);
459 struct thread *machine__find_thread(struct machine *machine, pid_t pid,
463 pthread_rwlock_rdlock(&machine->threads_lock);
464 th = ____machine__findnew_thread(machine, pid, tid, false);
465 pthread_rwlock_unlock(&machine->threads_lock);
469 struct comm *machine__thread_exec_comm(struct machine *machine,
470 struct thread *thread)
472 if (machine->comm_exec)
473 return thread__exec_comm(thread);
475 return thread__comm(thread);
478 int machine__process_comm_event(struct machine *machine, union perf_event *event,
479 struct perf_sample *sample)
481 struct thread *thread = machine__findnew_thread(machine,
484 bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
488 machine->comm_exec = true;
491 perf_event__fprintf_comm(event, stdout);
493 if (thread == NULL ||
494 __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
495 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
504 int machine__process_lost_event(struct machine *machine __maybe_unused,
505 union perf_event *event, struct perf_sample *sample __maybe_unused)
507 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
508 event->lost.id, event->lost.lost);
512 int machine__process_lost_samples_event(struct machine *machine __maybe_unused,
513 union perf_event *event, struct perf_sample *sample)
515 dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n",
516 sample->id, event->lost_samples.lost);
520 static struct dso *machine__findnew_module_dso(struct machine *machine,
522 const char *filename)
526 pthread_rwlock_wrlock(&machine->dsos.lock);
528 dso = __dsos__find(&machine->dsos, m->name, true);
530 dso = __dsos__addnew(&machine->dsos, m->name);
534 if (machine__is_host(machine))
535 dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
537 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
539 /* _KMODULE_COMP should be next to _KMODULE */
540 if (m->kmod && m->comp)
543 dso__set_short_name(dso, strdup(m->name), true);
544 dso__set_long_name(dso, strdup(filename), true);
549 pthread_rwlock_unlock(&machine->dsos.lock);
553 int machine__process_aux_event(struct machine *machine __maybe_unused,
554 union perf_event *event)
557 perf_event__fprintf_aux(event, stdout);
561 int machine__process_itrace_start_event(struct machine *machine __maybe_unused,
562 union perf_event *event)
565 perf_event__fprintf_itrace_start(event, stdout);
569 int machine__process_switch_event(struct machine *machine __maybe_unused,
570 union perf_event *event)
573 perf_event__fprintf_switch(event, stdout);
577 static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename)
579 const char *dup_filename;
581 if (!filename || !dso || !dso->long_name)
583 if (dso->long_name[0] != '[')
585 if (!strchr(filename, '/'))
588 dup_filename = strdup(filename);
592 dso__set_long_name(dso, dup_filename, true);
595 struct map *machine__findnew_module_map(struct machine *machine, u64 start,
596 const char *filename)
598 struct map *map = NULL;
599 struct dso *dso = NULL;
602 if (kmod_path__parse_name(&m, filename))
605 map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION,
609 * If the map's dso is an offline module, give dso__load()
610 * a chance to find the file path of that module by fixing
613 dso__adjust_kmod_long_name(map->dso, filename);
617 dso = machine__findnew_module_dso(machine, &m, filename);
621 map = map__new2(start, dso, MAP__FUNCTION);
625 map_groups__insert(&machine->kmaps, map);
627 /* Put the map here because map_groups__insert alread got it */
630 /* put the dso here, corresponding to machine__findnew_module_dso */
636 size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
639 size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp);
641 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
642 struct machine *pos = rb_entry(nd, struct machine, rb_node);
643 ret += __dsos__fprintf(&pos->dsos.head, fp);
649 size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
650 bool (skip)(struct dso *dso, int parm), int parm)
652 return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm);
655 size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
656 bool (skip)(struct dso *dso, int parm), int parm)
659 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
661 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
662 struct machine *pos = rb_entry(nd, struct machine, rb_node);
663 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
668 size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
672 struct dso *kdso = machine__kernel_map(machine)->dso;
674 if (kdso->has_build_id) {
675 char filename[PATH_MAX];
676 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
677 printed += fprintf(fp, "[0] %s\n", filename);
680 for (i = 0; i < vmlinux_path__nr_entries; ++i)
681 printed += fprintf(fp, "[%d] %s\n",
682 i + kdso->has_build_id, vmlinux_path[i]);
687 size_t machine__fprintf(struct machine *machine, FILE *fp)
692 pthread_rwlock_rdlock(&machine->threads_lock);
694 ret = fprintf(fp, "Threads: %u\n", machine->nr_threads);
696 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
697 struct thread *pos = rb_entry(nd, struct thread, rb_node);
699 ret += thread__fprintf(pos, fp);
702 pthread_rwlock_unlock(&machine->threads_lock);
707 static struct dso *machine__get_kernel(struct machine *machine)
709 const char *vmlinux_name = NULL;
712 if (machine__is_host(machine)) {
713 vmlinux_name = symbol_conf.vmlinux_name;
715 vmlinux_name = DSO__NAME_KALLSYMS;
717 kernel = machine__findnew_kernel(machine, vmlinux_name,
718 "[kernel]", DSO_TYPE_KERNEL);
722 if (machine__is_default_guest(machine))
723 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
725 vmlinux_name = machine__mmap_name(machine, bf,
728 kernel = machine__findnew_kernel(machine, vmlinux_name,
730 DSO_TYPE_GUEST_KERNEL);
733 if (kernel != NULL && (!kernel->has_build_id))
734 dso__read_running_kernel_build_id(kernel, machine);
739 struct process_args {
743 static void machine__get_kallsyms_filename(struct machine *machine, char *buf,
746 if (machine__is_default_guest(machine))
747 scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
749 scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
752 const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
754 /* Figure out the start address of kernel map from /proc/kallsyms.
755 * Returns the name of the start symbol in *symbol_name. Pass in NULL as
756 * symbol_name if it's not that important.
758 static u64 machine__get_running_kernel_start(struct machine *machine,
759 const char **symbol_name)
761 char filename[PATH_MAX];
766 machine__get_kallsyms_filename(machine, filename, PATH_MAX);
768 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
771 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
772 addr = kallsyms__get_function_start(filename, name);
783 int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
786 u64 start = machine__get_running_kernel_start(machine, NULL);
788 /* In case of renewal the kernel map, destroy previous one */
789 machine__destroy_kernel_maps(machine);
791 for (type = 0; type < MAP__NR_TYPES; ++type) {
795 machine->vmlinux_maps[type] = map__new2(start, kernel, type);
796 if (machine->vmlinux_maps[type] == NULL)
799 machine->vmlinux_maps[type]->map_ip =
800 machine->vmlinux_maps[type]->unmap_ip =
802 map = __machine__kernel_map(machine, type);
803 kmap = map__kmap(map);
807 kmap->kmaps = &machine->kmaps;
808 map_groups__insert(&machine->kmaps, map);
814 void machine__destroy_kernel_maps(struct machine *machine)
818 for (type = 0; type < MAP__NR_TYPES; ++type) {
820 struct map *map = __machine__kernel_map(machine, type);
825 kmap = map__kmap(map);
826 map_groups__remove(&machine->kmaps, map);
827 if (kmap && kmap->ref_reloc_sym) {
829 * ref_reloc_sym is shared among all maps, so free just
832 if (type == MAP__FUNCTION) {
833 zfree((char **)&kmap->ref_reloc_sym->name);
834 zfree(&kmap->ref_reloc_sym);
836 kmap->ref_reloc_sym = NULL;
839 map__put(machine->vmlinux_maps[type]);
840 machine->vmlinux_maps[type] = NULL;
844 int machines__create_guest_kernel_maps(struct machines *machines)
847 struct dirent **namelist = NULL;
853 if (symbol_conf.default_guest_vmlinux_name ||
854 symbol_conf.default_guest_modules ||
855 symbol_conf.default_guest_kallsyms) {
856 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
859 if (symbol_conf.guestmount) {
860 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
863 for (i = 0; i < items; i++) {
864 if (!isdigit(namelist[i]->d_name[0])) {
865 /* Filter out . and .. */
868 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
869 if ((*endp != '\0') ||
870 (endp == namelist[i]->d_name) ||
872 pr_debug("invalid directory (%s). Skipping.\n",
873 namelist[i]->d_name);
876 sprintf(path, "%s/%s/proc/kallsyms",
877 symbol_conf.guestmount,
878 namelist[i]->d_name);
879 ret = access(path, R_OK);
881 pr_debug("Can't access file %s\n", path);
884 machines__create_kernel_maps(machines, pid);
893 void machines__destroy_kernel_maps(struct machines *machines)
895 struct rb_node *next = rb_first(&machines->guests);
897 machine__destroy_kernel_maps(&machines->host);
900 struct machine *pos = rb_entry(next, struct machine, rb_node);
902 next = rb_next(&pos->rb_node);
903 rb_erase(&pos->rb_node, &machines->guests);
904 machine__delete(pos);
908 int machines__create_kernel_maps(struct machines *machines, pid_t pid)
910 struct machine *machine = machines__findnew(machines, pid);
915 return machine__create_kernel_maps(machine);
918 int __machine__load_kallsyms(struct machine *machine, const char *filename,
919 enum map_type type, bool no_kcore)
921 struct map *map = machine__kernel_map(machine);
922 int ret = __dso__load_kallsyms(map->dso, filename, map, no_kcore);
925 dso__set_loaded(map->dso, type);
927 * Since /proc/kallsyms will have multiple sessions for the
928 * kernel, with modules between them, fixup the end of all
931 __map_groups__fixup_end(&machine->kmaps, type);
937 int machine__load_kallsyms(struct machine *machine, const char *filename,
940 return __machine__load_kallsyms(machine, filename, type, false);
943 int machine__load_vmlinux_path(struct machine *machine, enum map_type type)
945 struct map *map = machine__kernel_map(machine);
946 int ret = dso__load_vmlinux_path(map->dso, map);
949 dso__set_loaded(map->dso, type);
954 static void map_groups__fixup_end(struct map_groups *mg)
957 for (i = 0; i < MAP__NR_TYPES; ++i)
958 __map_groups__fixup_end(mg, i);
961 static char *get_kernel_version(const char *root_dir)
963 char version[PATH_MAX];
966 const char *prefix = "Linux version ";
968 sprintf(version, "%s/proc/version", root_dir);
969 file = fopen(version, "r");
974 tmp = fgets(version, sizeof(version), file);
977 name = strstr(version, prefix);
980 name += strlen(prefix);
981 tmp = strchr(name, ' ');
988 static bool is_kmod_dso(struct dso *dso)
990 return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
991 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
994 static int map_groups__set_module_path(struct map_groups *mg, const char *path,
1000 map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name);
1004 long_name = strdup(path);
1005 if (long_name == NULL)
1008 dso__set_long_name(map->dso, long_name, true);
1009 dso__kernel_module_get_build_id(map->dso, "");
1012 * Full name could reveal us kmod compression, so
1013 * we need to update the symtab_type if needed.
1015 if (m->comp && is_kmod_dso(map->dso))
1016 map->dso->symtab_type++;
1021 static int map_groups__set_modules_path_dir(struct map_groups *mg,
1022 const char *dir_name, int depth)
1024 struct dirent *dent;
1025 DIR *dir = opendir(dir_name);
1029 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1033 while ((dent = readdir(dir)) != NULL) {
1034 char path[PATH_MAX];
1037 /*sshfs might return bad dent->d_type, so we have to stat*/
1038 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
1039 if (stat(path, &st))
1042 if (S_ISDIR(st.st_mode)) {
1043 if (!strcmp(dent->d_name, ".") ||
1044 !strcmp(dent->d_name, ".."))
1047 /* Do not follow top-level source and build symlinks */
1049 if (!strcmp(dent->d_name, "source") ||
1050 !strcmp(dent->d_name, "build"))
1054 ret = map_groups__set_modules_path_dir(mg, path,
1061 ret = kmod_path__parse_name(&m, dent->d_name);
1066 ret = map_groups__set_module_path(mg, path, &m);
1080 static int machine__set_modules_path(struct machine *machine)
1083 char modules_path[PATH_MAX];
1085 version = get_kernel_version(machine->root_dir);
1089 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
1090 machine->root_dir, version);
1093 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0);
1095 int __weak arch__fix_module_text_start(u64 *start __maybe_unused,
1096 const char *name __maybe_unused)
1101 static int machine__create_module(void *arg, const char *name, u64 start)
1103 struct machine *machine = arg;
1106 if (arch__fix_module_text_start(&start, name) < 0)
1109 map = machine__findnew_module_map(machine, start, name);
1113 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
1118 static int machine__create_modules(struct machine *machine)
1120 const char *modules;
1121 char path[PATH_MAX];
1123 if (machine__is_default_guest(machine)) {
1124 modules = symbol_conf.default_guest_modules;
1126 snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
1130 if (symbol__restricted_filename(modules, "/proc/modules"))
1133 if (modules__parse(modules, machine, machine__create_module))
1136 if (!machine__set_modules_path(machine))
1139 pr_debug("Problems setting modules path maps, continuing anyway...\n");
1144 int machine__create_kernel_maps(struct machine *machine)
1146 struct dso *kernel = machine__get_kernel(machine);
1154 ret = __machine__create_kernel_maps(machine, kernel);
1159 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
1160 if (machine__is_host(machine))
1161 pr_debug("Problems creating module maps, "
1162 "continuing anyway...\n");
1164 pr_debug("Problems creating module maps for guest %d, "
1165 "continuing anyway...\n", machine->pid);
1169 * Now that we have all the maps created, just set the ->end of them:
1171 map_groups__fixup_end(&machine->kmaps);
1173 addr = machine__get_running_kernel_start(machine, &name);
1175 } else if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, addr)) {
1176 machine__destroy_kernel_maps(machine);
1183 static void machine__set_kernel_mmap_len(struct machine *machine,
1184 union perf_event *event)
1188 for (i = 0; i < MAP__NR_TYPES; i++) {
1189 machine->vmlinux_maps[i]->start = event->mmap.start;
1190 machine->vmlinux_maps[i]->end = (event->mmap.start +
1193 * Be a bit paranoid here, some perf.data file came with
1194 * a zero sized synthesized MMAP event for the kernel.
1196 if (machine->vmlinux_maps[i]->end == 0)
1197 machine->vmlinux_maps[i]->end = ~0ULL;
1201 static bool machine__uses_kcore(struct machine *machine)
1205 list_for_each_entry(dso, &machine->dsos.head, node) {
1206 if (dso__is_kcore(dso))
1213 static int machine__process_kernel_mmap_event(struct machine *machine,
1214 union perf_event *event)
1217 char kmmap_prefix[PATH_MAX];
1218 enum dso_kernel_type kernel_type;
1219 bool is_kernel_mmap;
1221 /* If we have maps from kcore then we do not need or want any others */
1222 if (machine__uses_kcore(machine))
1225 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
1226 if (machine__is_host(machine))
1227 kernel_type = DSO_TYPE_KERNEL;
1229 kernel_type = DSO_TYPE_GUEST_KERNEL;
1231 is_kernel_mmap = memcmp(event->mmap.filename,
1233 strlen(kmmap_prefix) - 1) == 0;
1234 if (event->mmap.filename[0] == '/' ||
1235 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
1236 map = machine__findnew_module_map(machine, event->mmap.start,
1237 event->mmap.filename);
1241 map->end = map->start + event->mmap.len;
1242 } else if (is_kernel_mmap) {
1243 const char *symbol_name = (event->mmap.filename +
1244 strlen(kmmap_prefix));
1246 * Should be there already, from the build-id table in
1249 struct dso *kernel = NULL;
1252 pthread_rwlock_rdlock(&machine->dsos.lock);
1254 list_for_each_entry(dso, &machine->dsos.head, node) {
1257 * The cpumode passed to is_kernel_module is not the
1258 * cpumode of *this* event. If we insist on passing
1259 * correct cpumode to is_kernel_module, we should
1260 * record the cpumode when we adding this dso to the
1263 * However we don't really need passing correct
1264 * cpumode. We know the correct cpumode must be kernel
1265 * mode (if not, we should not link it onto kernel_dsos
1268 * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN.
1269 * is_kernel_module() treats it as a kernel cpumode.
1273 is_kernel_module(dso->long_name,
1274 PERF_RECORD_MISC_CPUMODE_UNKNOWN))
1282 pthread_rwlock_unlock(&machine->dsos.lock);
1285 kernel = machine__findnew_dso(machine, kmmap_prefix);
1289 kernel->kernel = kernel_type;
1290 if (__machine__create_kernel_maps(machine, kernel) < 0) {
1295 if (strstr(kernel->long_name, "vmlinux"))
1296 dso__set_short_name(kernel, "[kernel.vmlinux]", false);
1298 machine__set_kernel_mmap_len(machine, event);
1301 * Avoid using a zero address (kptr_restrict) for the ref reloc
1302 * symbol. Effectively having zero here means that at record
1303 * time /proc/sys/kernel/kptr_restrict was non zero.
1305 if (event->mmap.pgoff != 0) {
1306 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
1311 if (machine__is_default_guest(machine)) {
1313 * preload dso of guest kernel and modules
1315 dso__load(kernel, machine__kernel_map(machine));
1323 int machine__process_mmap2_event(struct machine *machine,
1324 union perf_event *event,
1325 struct perf_sample *sample)
1327 struct thread *thread;
1333 perf_event__fprintf_mmap2(event, stdout);
1335 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1336 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1337 ret = machine__process_kernel_mmap_event(machine, event);
1343 thread = machine__findnew_thread(machine, event->mmap2.pid,
1348 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1349 type = MAP__VARIABLE;
1351 type = MAP__FUNCTION;
1353 map = map__new(machine, event->mmap2.start,
1354 event->mmap2.len, event->mmap2.pgoff,
1355 event->mmap2.pid, event->mmap2.maj,
1356 event->mmap2.min, event->mmap2.ino,
1357 event->mmap2.ino_generation,
1360 event->mmap2.filename, type, thread);
1363 goto out_problem_map;
1365 ret = thread__insert_map(thread, map);
1367 goto out_problem_insert;
1369 thread__put(thread);
1376 thread__put(thread);
1378 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1382 int machine__process_mmap_event(struct machine *machine, union perf_event *event,
1383 struct perf_sample *sample)
1385 struct thread *thread;
1391 perf_event__fprintf_mmap(event, stdout);
1393 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1394 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1395 ret = machine__process_kernel_mmap_event(machine, event);
1401 thread = machine__findnew_thread(machine, event->mmap.pid,
1406 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1407 type = MAP__VARIABLE;
1409 type = MAP__FUNCTION;
1411 map = map__new(machine, event->mmap.start,
1412 event->mmap.len, event->mmap.pgoff,
1413 event->mmap.pid, 0, 0, 0, 0, 0, 0,
1414 event->mmap.filename,
1418 goto out_problem_map;
1420 ret = thread__insert_map(thread, map);
1422 goto out_problem_insert;
1424 thread__put(thread);
1431 thread__put(thread);
1433 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1437 static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock)
1439 if (machine->last_match == th)
1440 machine->last_match = NULL;
1442 BUG_ON(atomic_read(&th->refcnt) == 0);
1444 pthread_rwlock_wrlock(&machine->threads_lock);
1445 rb_erase_init(&th->rb_node, &machine->threads);
1446 RB_CLEAR_NODE(&th->rb_node);
1447 --machine->nr_threads;
1449 * Move it first to the dead_threads list, then drop the reference,
1450 * if this is the last reference, then the thread__delete destructor
1451 * will be called and we will remove it from the dead_threads list.
1453 list_add_tail(&th->node, &machine->dead_threads);
1455 pthread_rwlock_unlock(&machine->threads_lock);
1459 void machine__remove_thread(struct machine *machine, struct thread *th)
1461 return __machine__remove_thread(machine, th, true);
1464 int machine__process_fork_event(struct machine *machine, union perf_event *event,
1465 struct perf_sample *sample)
1467 struct thread *thread = machine__find_thread(machine,
1470 struct thread *parent = machine__findnew_thread(machine,
1476 perf_event__fprintf_task(event, stdout);
1479 * There may be an existing thread that is not actually the parent,
1480 * either because we are processing events out of order, or because the
1481 * (fork) event that would have removed the thread was lost. Assume the
1482 * latter case and continue on as best we can.
1484 if (parent->pid_ != (pid_t)event->fork.ppid) {
1485 dump_printf("removing erroneous parent thread %d/%d\n",
1486 parent->pid_, parent->tid);
1487 machine__remove_thread(machine, parent);
1488 thread__put(parent);
1489 parent = machine__findnew_thread(machine, event->fork.ppid,
1493 /* if a thread currently exists for the thread id remove it */
1494 if (thread != NULL) {
1495 machine__remove_thread(machine, thread);
1496 thread__put(thread);
1499 thread = machine__findnew_thread(machine, event->fork.pid,
1502 if (thread == NULL || parent == NULL ||
1503 thread__fork(thread, parent, sample->time) < 0) {
1504 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1507 thread__put(thread);
1508 thread__put(parent);
1513 int machine__process_exit_event(struct machine *machine, union perf_event *event,
1514 struct perf_sample *sample __maybe_unused)
1516 struct thread *thread = machine__find_thread(machine,
1521 perf_event__fprintf_task(event, stdout);
1523 if (thread != NULL) {
1524 thread__exited(thread);
1525 thread__put(thread);
1531 int machine__process_event(struct machine *machine, union perf_event *event,
1532 struct perf_sample *sample)
1536 switch (event->header.type) {
1537 case PERF_RECORD_COMM:
1538 ret = machine__process_comm_event(machine, event, sample); break;
1539 case PERF_RECORD_MMAP:
1540 ret = machine__process_mmap_event(machine, event, sample); break;
1541 case PERF_RECORD_MMAP2:
1542 ret = machine__process_mmap2_event(machine, event, sample); break;
1543 case PERF_RECORD_FORK:
1544 ret = machine__process_fork_event(machine, event, sample); break;
1545 case PERF_RECORD_EXIT:
1546 ret = machine__process_exit_event(machine, event, sample); break;
1547 case PERF_RECORD_LOST:
1548 ret = machine__process_lost_event(machine, event, sample); break;
1549 case PERF_RECORD_AUX:
1550 ret = machine__process_aux_event(machine, event); break;
1551 case PERF_RECORD_ITRACE_START:
1552 ret = machine__process_itrace_start_event(machine, event); break;
1553 case PERF_RECORD_LOST_SAMPLES:
1554 ret = machine__process_lost_samples_event(machine, event, sample); break;
1555 case PERF_RECORD_SWITCH:
1556 case PERF_RECORD_SWITCH_CPU_WIDE:
1557 ret = machine__process_switch_event(machine, event); break;
1566 static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
1568 if (!regexec(regex, sym->name, 0, NULL, 0))
1573 static void ip__resolve_ams(struct thread *thread,
1574 struct addr_map_symbol *ams,
1577 struct addr_location al;
1579 memset(&al, 0, sizeof(al));
1581 * We cannot use the header.misc hint to determine whether a
1582 * branch stack address is user, kernel, guest, hypervisor.
1583 * Branches may straddle the kernel/user/hypervisor boundaries.
1584 * Thus, we have to try consecutively until we find a match
1585 * or else, the symbol is unknown
1587 thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al);
1590 ams->al_addr = al.addr;
1595 static void ip__resolve_data(struct thread *thread,
1596 u8 m, struct addr_map_symbol *ams, u64 addr)
1598 struct addr_location al;
1600 memset(&al, 0, sizeof(al));
1602 thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al);
1603 if (al.map == NULL) {
1605 * some shared data regions have execute bit set which puts
1606 * their mapping in the MAP__FUNCTION type array.
1607 * Check there as a fallback option before dropping the sample.
1609 thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al);
1613 ams->al_addr = al.addr;
1618 struct mem_info *sample__resolve_mem(struct perf_sample *sample,
1619 struct addr_location *al)
1621 struct mem_info *mi = zalloc(sizeof(*mi));
1626 ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
1627 ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr);
1628 mi->data_src.val = sample->data_src;
1633 static int add_callchain_ip(struct thread *thread,
1634 struct callchain_cursor *cursor,
1635 struct symbol **parent,
1636 struct addr_location *root_al,
1640 struct branch_flags *flags,
1644 struct addr_location al;
1649 thread__find_cpumode_addr_location(thread, MAP__FUNCTION,
1652 if (ip >= PERF_CONTEXT_MAX) {
1654 case PERF_CONTEXT_HV:
1655 *cpumode = PERF_RECORD_MISC_HYPERVISOR;
1657 case PERF_CONTEXT_KERNEL:
1658 *cpumode = PERF_RECORD_MISC_KERNEL;
1660 case PERF_CONTEXT_USER:
1661 *cpumode = PERF_RECORD_MISC_USER;
1664 pr_debug("invalid callchain context: "
1665 "%"PRId64"\n", (s64) ip);
1667 * It seems the callchain is corrupted.
1670 callchain_cursor_reset(cursor);
1675 thread__find_addr_location(thread, *cpumode, MAP__FUNCTION,
1679 if (al.sym != NULL) {
1680 if (perf_hpp_list.parent && !*parent &&
1681 symbol__match_regex(al.sym, &parent_regex))
1683 else if (have_ignore_callees && root_al &&
1684 symbol__match_regex(al.sym, &ignore_callees_regex)) {
1685 /* Treat this symbol as the root,
1686 forgetting its callees. */
1688 callchain_cursor_reset(cursor);
1692 if (symbol_conf.hide_unresolved && al.sym == NULL)
1694 return callchain_cursor_append(cursor, al.addr, al.map, al.sym,
1695 branch, flags, nr_loop_iter, samples);
1698 struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
1699 struct addr_location *al)
1702 const struct branch_stack *bs = sample->branch_stack;
1703 struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
1708 for (i = 0; i < bs->nr; i++) {
1709 ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
1710 ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
1711 bi[i].flags = bs->entries[i].flags;
1718 #define NO_ENTRY 0xff
1720 #define PERF_MAX_BRANCH_DEPTH 127
1723 static int remove_loops(struct branch_entry *l, int nr)
1726 unsigned char chash[CHASHSZ];
1728 memset(chash, NO_ENTRY, sizeof(chash));
1730 BUG_ON(PERF_MAX_BRANCH_DEPTH > 255);
1732 for (i = 0; i < nr; i++) {
1733 int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ;
1735 /* no collision handling for now */
1736 if (chash[h] == NO_ENTRY) {
1738 } else if (l[chash[h]].from == l[i].from) {
1739 bool is_loop = true;
1740 /* check if it is a real loop */
1742 for (j = chash[h]; j < i && i + off < nr; j++, off++)
1743 if (l[j].from != l[i + off].from) {
1748 memmove(l + i, l + i + off,
1749 (nr - (i + off)) * sizeof(*l));
1758 * Recolve LBR callstack chain sample
1760 * 1 on success get LBR callchain information
1761 * 0 no available LBR callchain information, should try fp
1762 * negative error code on other errors.
1764 static int resolve_lbr_callchain_sample(struct thread *thread,
1765 struct callchain_cursor *cursor,
1766 struct perf_sample *sample,
1767 struct symbol **parent,
1768 struct addr_location *root_al,
1771 struct ip_callchain *chain = sample->callchain;
1772 int chain_nr = min(max_stack, (int)chain->nr), i;
1773 u8 cpumode = PERF_RECORD_MISC_USER;
1776 for (i = 0; i < chain_nr; i++) {
1777 if (chain->ips[i] == PERF_CONTEXT_USER)
1781 /* LBR only affects the user callchain */
1782 if (i != chain_nr) {
1783 struct branch_stack *lbr_stack = sample->branch_stack;
1784 int lbr_nr = lbr_stack->nr, j, k;
1786 struct branch_flags *flags;
1788 * LBR callstack can only get user call chain.
1789 * The mix_chain_nr is kernel call chain
1790 * number plus LBR user call chain number.
1791 * i is kernel call chain number,
1792 * 1 is PERF_CONTEXT_USER,
1793 * lbr_nr + 1 is the user call chain number.
1794 * For details, please refer to the comments
1795 * in callchain__printf
1797 int mix_chain_nr = i + 1 + lbr_nr + 1;
1799 for (j = 0; j < mix_chain_nr; j++) {
1804 if (callchain_param.order == ORDER_CALLEE) {
1807 else if (j > i + 1) {
1809 ip = lbr_stack->entries[k].from;
1811 flags = &lbr_stack->entries[k].flags;
1813 ip = lbr_stack->entries[0].to;
1815 flags = &lbr_stack->entries[0].flags;
1820 ip = lbr_stack->entries[k].from;
1822 flags = &lbr_stack->entries[k].flags;
1824 else if (j > lbr_nr)
1825 ip = chain->ips[i + 1 - (j - lbr_nr)];
1827 ip = lbr_stack->entries[0].to;
1829 flags = &lbr_stack->entries[0].flags;
1833 err = add_callchain_ip(thread, cursor, parent,
1834 root_al, &cpumode, ip,
1835 branch, flags, 0, 0);
1837 return (err < 0) ? err : 0;
1845 static int thread__resolve_callchain_sample(struct thread *thread,
1846 struct callchain_cursor *cursor,
1847 struct perf_evsel *evsel,
1848 struct perf_sample *sample,
1849 struct symbol **parent,
1850 struct addr_location *root_al,
1853 struct branch_stack *branch = sample->branch_stack;
1854 struct ip_callchain *chain = sample->callchain;
1855 int chain_nr = chain->nr;
1856 u8 cpumode = PERF_RECORD_MISC_USER;
1857 int i, j, err, nr_entries;
1862 if (perf_evsel__has_branch_callstack(evsel)) {
1863 err = resolve_lbr_callchain_sample(thread, cursor, sample, parent,
1864 root_al, max_stack);
1866 return (err < 0) ? err : 0;
1870 * Based on DWARF debug information, some architectures skip
1871 * a callchain entry saved by the kernel.
1873 skip_idx = arch_skip_callchain_idx(thread, chain);
1876 * Add branches to call stack for easier browsing. This gives
1877 * more context for a sample than just the callers.
1879 * This uses individual histograms of paths compared to the
1880 * aggregated histograms the normal LBR mode uses.
1882 * Limitations for now:
1883 * - No extra filters
1884 * - No annotations (should annotate somehow)
1887 if (branch && callchain_param.branch_callstack) {
1888 int nr = min(max_stack, (int)branch->nr);
1889 struct branch_entry be[nr];
1891 if (branch->nr > PERF_MAX_BRANCH_DEPTH) {
1892 pr_warning("corrupted branch chain. skipping...\n");
1896 for (i = 0; i < nr; i++) {
1897 if (callchain_param.order == ORDER_CALLEE) {
1898 be[i] = branch->entries[i];
1900 * Check for overlap into the callchain.
1901 * The return address is one off compared to
1902 * the branch entry. To adjust for this
1903 * assume the calling instruction is not longer
1906 if (i == skip_idx ||
1907 chain->ips[first_call] >= PERF_CONTEXT_MAX)
1909 else if (be[i].from < chain->ips[first_call] &&
1910 be[i].from >= chain->ips[first_call] - 8)
1913 be[i] = branch->entries[branch->nr - i - 1];
1917 nr = remove_loops(be, nr);
1920 * Get the number of iterations.
1921 * It's only approximation, but good enough in practice.
1923 if (nr_loop_iter > nr)
1924 nr_loop_iter = nr_loop_iter - nr + 1;
1928 for (i = 0; i < nr; i++) {
1930 err = add_callchain_ip(thread, cursor, parent,
1936 err = add_callchain_ip(thread, cursor, parent,
1943 err = add_callchain_ip(thread, cursor, parent, root_al,
1956 for (i = first_call, nr_entries = 0;
1957 i < chain_nr && nr_entries < max_stack; i++) {
1960 if (callchain_param.order == ORDER_CALLEE)
1963 j = chain->nr - i - 1;
1965 #ifdef HAVE_SKIP_CALLCHAIN_IDX
1971 if (ip < PERF_CONTEXT_MAX)
1974 err = add_callchain_ip(thread, cursor, parent,
1975 root_al, &cpumode, ip,
1979 return (err < 0) ? err : 0;
1985 static int unwind_entry(struct unwind_entry *entry, void *arg)
1987 struct callchain_cursor *cursor = arg;
1989 if (symbol_conf.hide_unresolved && entry->sym == NULL)
1991 return callchain_cursor_append(cursor, entry->ip,
1992 entry->map, entry->sym,
1996 static int thread__resolve_callchain_unwind(struct thread *thread,
1997 struct callchain_cursor *cursor,
1998 struct perf_evsel *evsel,
1999 struct perf_sample *sample,
2002 /* Can we do dwarf post unwind? */
2003 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
2004 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
2007 /* Bail out if nothing was captured. */
2008 if ((!sample->user_regs.regs) ||
2009 (!sample->user_stack.size))
2012 return unwind__get_entries(unwind_entry, cursor,
2013 thread, sample, max_stack);
2016 int thread__resolve_callchain(struct thread *thread,
2017 struct callchain_cursor *cursor,
2018 struct perf_evsel *evsel,
2019 struct perf_sample *sample,
2020 struct symbol **parent,
2021 struct addr_location *root_al,
2026 callchain_cursor_reset(&callchain_cursor);
2028 if (callchain_param.order == ORDER_CALLEE) {
2029 ret = thread__resolve_callchain_sample(thread, cursor,
2035 ret = thread__resolve_callchain_unwind(thread, cursor,
2039 ret = thread__resolve_callchain_unwind(thread, cursor,
2044 ret = thread__resolve_callchain_sample(thread, cursor,
2053 int machine__for_each_thread(struct machine *machine,
2054 int (*fn)(struct thread *thread, void *p),
2058 struct thread *thread;
2061 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
2062 thread = rb_entry(nd, struct thread, rb_node);
2063 rc = fn(thread, priv);
2068 list_for_each_entry(thread, &machine->dead_threads, node) {
2069 rc = fn(thread, priv);
2076 int machines__for_each_thread(struct machines *machines,
2077 int (*fn)(struct thread *thread, void *p),
2083 rc = machine__for_each_thread(&machines->host, fn, priv);
2087 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
2088 struct machine *machine = rb_entry(nd, struct machine, rb_node);
2090 rc = machine__for_each_thread(machine, fn, priv);
2097 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
2098 struct target *target, struct thread_map *threads,
2099 perf_event__handler_t process, bool data_mmap,
2100 unsigned int proc_map_timeout)
2102 if (target__has_task(target))
2103 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap, proc_map_timeout);
2104 else if (target__has_cpu(target))
2105 return perf_event__synthesize_threads(tool, process, machine, data_mmap, proc_map_timeout);
2106 /* command specified */
2110 pid_t machine__get_current_tid(struct machine *machine, int cpu)
2112 if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid)
2115 return machine->current_tid[cpu];
2118 int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
2121 struct thread *thread;
2126 if (!machine->current_tid) {
2129 machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t));
2130 if (!machine->current_tid)
2132 for (i = 0; i < MAX_NR_CPUS; i++)
2133 machine->current_tid[i] = -1;
2136 if (cpu >= MAX_NR_CPUS) {
2137 pr_err("Requested CPU %d too large. ", cpu);
2138 pr_err("Consider raising MAX_NR_CPUS\n");
2142 machine->current_tid[cpu] = tid;
2144 thread = machine__findnew_thread(machine, pid, tid);
2149 thread__put(thread);
2154 int machine__get_kernel_start(struct machine *machine)
2156 struct map *map = machine__kernel_map(machine);
2160 * The only addresses above 2^63 are kernel addresses of a 64-bit
2161 * kernel. Note that addresses are unsigned so that on a 32-bit system
2162 * all addresses including kernel addresses are less than 2^32. In
2163 * that case (32-bit system), if the kernel mapping is unknown, all
2164 * addresses will be assumed to be in user space - see
2165 * machine__kernel_ip().
2167 machine->kernel_start = 1ULL << 63;
2169 err = map__load(map);
2171 machine->kernel_start = map->start;
2176 struct dso *machine__findnew_dso(struct machine *machine, const char *filename)
2178 return dsos__findnew(&machine->dsos, filename);
2181 char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
2183 struct machine *machine = vmachine;
2185 struct symbol *sym = map_groups__find_symbol(&machine->kmaps, MAP__FUNCTION, *addrp, &map);
2190 *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL;
2191 *addrp = map->unmap_ip(map, sym->start);