13 #include <symbol/kallsyms.h>
16 static void dsos__init(struct dsos *dsos)
18 INIT_LIST_HEAD(&dsos->head);
22 int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
24 map_groups__init(&machine->kmaps, machine);
25 RB_CLEAR_NODE(&machine->rb_node);
26 dsos__init(&machine->user_dsos);
27 dsos__init(&machine->kernel_dsos);
29 machine->threads = RB_ROOT;
30 INIT_LIST_HEAD(&machine->dead_threads);
31 machine->last_match = NULL;
33 machine->vdso_info = NULL;
37 machine->symbol_filter = NULL;
38 machine->id_hdr_size = 0;
39 machine->comm_exec = false;
40 machine->kernel_start = 0;
42 machine->root_dir = strdup(root_dir);
43 if (machine->root_dir == NULL)
46 if (pid != HOST_KERNEL_ID) {
47 struct thread *thread = machine__findnew_thread(machine, -1,
54 snprintf(comm, sizeof(comm), "[guest/%d]", pid);
55 thread__set_comm(thread, comm, 0);
58 machine->current_tid = NULL;
63 struct machine *machine__new_host(void)
65 struct machine *machine = malloc(sizeof(*machine));
67 if (machine != NULL) {
68 machine__init(machine, "", HOST_KERNEL_ID);
70 if (machine__create_kernel_maps(machine) < 0)
80 static void dsos__delete(struct dsos *dsos)
84 list_for_each_entry_safe(pos, n, &dsos->head, node) {
85 RB_CLEAR_NODE(&pos->rb_node);
91 void machine__delete_dead_threads(struct machine *machine)
95 list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
101 void machine__delete_threads(struct machine *machine)
103 struct rb_node *nd = rb_first(&machine->threads);
106 struct thread *t = rb_entry(nd, struct thread, rb_node);
108 rb_erase(&t->rb_node, &machine->threads);
114 void machine__exit(struct machine *machine)
116 map_groups__exit(&machine->kmaps);
117 dsos__delete(&machine->user_dsos);
118 dsos__delete(&machine->kernel_dsos);
120 zfree(&machine->root_dir);
121 zfree(&machine->current_tid);
124 void machine__delete(struct machine *machine)
126 machine__exit(machine);
130 void machines__init(struct machines *machines)
132 machine__init(&machines->host, "", HOST_KERNEL_ID);
133 machines->guests = RB_ROOT;
134 machines->symbol_filter = NULL;
137 void machines__exit(struct machines *machines)
139 machine__exit(&machines->host);
143 struct machine *machines__add(struct machines *machines, pid_t pid,
144 const char *root_dir)
146 struct rb_node **p = &machines->guests.rb_node;
147 struct rb_node *parent = NULL;
148 struct machine *pos, *machine = malloc(sizeof(*machine));
153 if (machine__init(machine, root_dir, pid) != 0) {
158 machine->symbol_filter = machines->symbol_filter;
162 pos = rb_entry(parent, struct machine, rb_node);
169 rb_link_node(&machine->rb_node, parent, p);
170 rb_insert_color(&machine->rb_node, &machines->guests);
175 void machines__set_symbol_filter(struct machines *machines,
176 symbol_filter_t symbol_filter)
180 machines->symbol_filter = symbol_filter;
181 machines->host.symbol_filter = symbol_filter;
183 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
184 struct machine *machine = rb_entry(nd, struct machine, rb_node);
186 machine->symbol_filter = symbol_filter;
190 void machines__set_comm_exec(struct machines *machines, bool comm_exec)
194 machines->host.comm_exec = comm_exec;
196 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
197 struct machine *machine = rb_entry(nd, struct machine, rb_node);
199 machine->comm_exec = comm_exec;
203 struct machine *machines__find(struct machines *machines, pid_t pid)
205 struct rb_node **p = &machines->guests.rb_node;
206 struct rb_node *parent = NULL;
207 struct machine *machine;
208 struct machine *default_machine = NULL;
210 if (pid == HOST_KERNEL_ID)
211 return &machines->host;
215 machine = rb_entry(parent, struct machine, rb_node);
216 if (pid < machine->pid)
218 else if (pid > machine->pid)
223 default_machine = machine;
226 return default_machine;
229 struct machine *machines__findnew(struct machines *machines, pid_t pid)
232 const char *root_dir = "";
233 struct machine *machine = machines__find(machines, pid);
235 if (machine && (machine->pid == pid))
238 if ((pid != HOST_KERNEL_ID) &&
239 (pid != DEFAULT_GUEST_KERNEL_ID) &&
240 (symbol_conf.guestmount)) {
241 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
242 if (access(path, R_OK)) {
243 static struct strlist *seen;
246 seen = strlist__new(true, NULL);
248 if (!strlist__has_entry(seen, path)) {
249 pr_err("Can't access file %s\n", path);
250 strlist__add(seen, path);
258 machine = machines__add(machines, pid, root_dir);
263 void machines__process_guests(struct machines *machines,
264 machine__process_t process, void *data)
268 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
269 struct machine *pos = rb_entry(nd, struct machine, rb_node);
274 char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
276 if (machine__is_host(machine))
277 snprintf(bf, size, "[%s]", "kernel.kallsyms");
278 else if (machine__is_default_guest(machine))
279 snprintf(bf, size, "[%s]", "guest.kernel.kallsyms");
281 snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms",
288 void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
290 struct rb_node *node;
291 struct machine *machine;
293 machines->host.id_hdr_size = id_hdr_size;
295 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
296 machine = rb_entry(node, struct machine, rb_node);
297 machine->id_hdr_size = id_hdr_size;
303 static void machine__update_thread_pid(struct machine *machine,
304 struct thread *th, pid_t pid)
306 struct thread *leader;
308 if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
313 if (th->pid_ == th->tid)
316 leader = machine__findnew_thread(machine, th->pid_, th->pid_);
321 leader->mg = map_groups__new(machine);
326 if (th->mg == leader->mg)
331 * Maps are created from MMAP events which provide the pid and
332 * tid. Consequently there never should be any maps on a thread
333 * with an unknown pid. Just print an error if there are.
335 if (!map_groups__empty(th->mg))
336 pr_err("Discarding thread maps for %d:%d\n",
338 map_groups__delete(th->mg);
341 th->mg = map_groups__get(leader->mg);
346 pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
349 static struct thread *__machine__findnew_thread(struct machine *machine,
350 pid_t pid, pid_t tid,
353 struct rb_node **p = &machine->threads.rb_node;
354 struct rb_node *parent = NULL;
358 * Front-end cache - TID lookups come in blocks,
359 * so most of the time we dont have to look up
362 th = machine->last_match;
363 if (th && th->tid == tid) {
364 machine__update_thread_pid(machine, th, pid);
370 th = rb_entry(parent, struct thread, rb_node);
372 if (th->tid == tid) {
373 machine->last_match = th;
374 machine__update_thread_pid(machine, th, pid);
387 th = thread__new(pid, tid);
389 rb_link_node(&th->rb_node, parent, p);
390 rb_insert_color(&th->rb_node, &machine->threads);
391 machine->last_match = th;
394 * We have to initialize map_groups separately
395 * after rb tree is updated.
397 * The reason is that we call machine__findnew_thread
398 * within thread__init_map_groups to find the thread
399 * leader and that would screwed the rb tree.
401 if (thread__init_map_groups(th, machine)) {
410 struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
413 return __machine__findnew_thread(machine, pid, tid, true);
416 struct thread *machine__find_thread(struct machine *machine, pid_t pid,
419 return __machine__findnew_thread(machine, pid, tid, false);
422 struct comm *machine__thread_exec_comm(struct machine *machine,
423 struct thread *thread)
425 if (machine->comm_exec)
426 return thread__exec_comm(thread);
428 return thread__comm(thread);
431 int machine__process_comm_event(struct machine *machine, union perf_event *event,
432 struct perf_sample *sample)
434 struct thread *thread = machine__findnew_thread(machine,
437 bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
440 machine->comm_exec = true;
443 perf_event__fprintf_comm(event, stdout);
445 if (thread == NULL ||
446 __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
447 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
454 int machine__process_lost_event(struct machine *machine __maybe_unused,
455 union perf_event *event, struct perf_sample *sample __maybe_unused)
457 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
458 event->lost.id, event->lost.lost);
462 struct map *machine__new_module(struct machine *machine, u64 start,
463 const char *filename)
466 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename);
471 map = map__new2(start, dso, MAP__FUNCTION);
475 if (machine__is_host(machine))
476 dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
478 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
479 map_groups__insert(&machine->kmaps, map);
483 size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
486 size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) +
487 __dsos__fprintf(&machines->host.user_dsos.head, fp);
489 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
490 struct machine *pos = rb_entry(nd, struct machine, rb_node);
491 ret += __dsos__fprintf(&pos->kernel_dsos.head, fp);
492 ret += __dsos__fprintf(&pos->user_dsos.head, fp);
498 size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
499 bool (skip)(struct dso *dso, int parm), int parm)
501 return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) +
502 __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm);
505 size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
506 bool (skip)(struct dso *dso, int parm), int parm)
509 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
511 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
512 struct machine *pos = rb_entry(nd, struct machine, rb_node);
513 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
518 size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
522 struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso;
524 if (kdso->has_build_id) {
525 char filename[PATH_MAX];
526 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
527 printed += fprintf(fp, "[0] %s\n", filename);
530 for (i = 0; i < vmlinux_path__nr_entries; ++i)
531 printed += fprintf(fp, "[%d] %s\n",
532 i + kdso->has_build_id, vmlinux_path[i]);
537 size_t machine__fprintf(struct machine *machine, FILE *fp)
542 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
543 struct thread *pos = rb_entry(nd, struct thread, rb_node);
545 ret += thread__fprintf(pos, fp);
551 static struct dso *machine__get_kernel(struct machine *machine)
553 const char *vmlinux_name = NULL;
556 if (machine__is_host(machine)) {
557 vmlinux_name = symbol_conf.vmlinux_name;
559 vmlinux_name = "[kernel.kallsyms]";
561 kernel = dso__kernel_findnew(machine, vmlinux_name,
567 if (machine__is_default_guest(machine))
568 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
570 vmlinux_name = machine__mmap_name(machine, bf,
573 kernel = dso__kernel_findnew(machine, vmlinux_name,
575 DSO_TYPE_GUEST_KERNEL);
578 if (kernel != NULL && (!kernel->has_build_id))
579 dso__read_running_kernel_build_id(kernel, machine);
584 struct process_args {
588 static void machine__get_kallsyms_filename(struct machine *machine, char *buf,
591 if (machine__is_default_guest(machine))
592 scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
594 scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
597 const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
599 /* Figure out the start address of kernel map from /proc/kallsyms.
600 * Returns the name of the start symbol in *symbol_name. Pass in NULL as
601 * symbol_name if it's not that important.
603 static u64 machine__get_running_kernel_start(struct machine *machine,
604 const char **symbol_name)
606 char filename[PATH_MAX];
611 machine__get_kallsyms_filename(machine, filename, PATH_MAX);
613 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
616 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
617 addr = kallsyms__get_function_start(filename, name);
628 int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
631 u64 start = machine__get_running_kernel_start(machine, NULL);
633 for (type = 0; type < MAP__NR_TYPES; ++type) {
636 machine->vmlinux_maps[type] = map__new2(start, kernel, type);
637 if (machine->vmlinux_maps[type] == NULL)
640 machine->vmlinux_maps[type]->map_ip =
641 machine->vmlinux_maps[type]->unmap_ip =
643 kmap = map__kmap(machine->vmlinux_maps[type]);
644 kmap->kmaps = &machine->kmaps;
645 map_groups__insert(&machine->kmaps,
646 machine->vmlinux_maps[type]);
652 void machine__destroy_kernel_maps(struct machine *machine)
656 for (type = 0; type < MAP__NR_TYPES; ++type) {
659 if (machine->vmlinux_maps[type] == NULL)
662 kmap = map__kmap(machine->vmlinux_maps[type]);
663 map_groups__remove(&machine->kmaps,
664 machine->vmlinux_maps[type]);
665 if (kmap->ref_reloc_sym) {
667 * ref_reloc_sym is shared among all maps, so free just
670 if (type == MAP__FUNCTION) {
671 zfree((char **)&kmap->ref_reloc_sym->name);
672 zfree(&kmap->ref_reloc_sym);
674 kmap->ref_reloc_sym = NULL;
677 map__delete(machine->vmlinux_maps[type]);
678 machine->vmlinux_maps[type] = NULL;
682 int machines__create_guest_kernel_maps(struct machines *machines)
685 struct dirent **namelist = NULL;
691 if (symbol_conf.default_guest_vmlinux_name ||
692 symbol_conf.default_guest_modules ||
693 symbol_conf.default_guest_kallsyms) {
694 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
697 if (symbol_conf.guestmount) {
698 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
701 for (i = 0; i < items; i++) {
702 if (!isdigit(namelist[i]->d_name[0])) {
703 /* Filter out . and .. */
706 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
707 if ((*endp != '\0') ||
708 (endp == namelist[i]->d_name) ||
710 pr_debug("invalid directory (%s). Skipping.\n",
711 namelist[i]->d_name);
714 sprintf(path, "%s/%s/proc/kallsyms",
715 symbol_conf.guestmount,
716 namelist[i]->d_name);
717 ret = access(path, R_OK);
719 pr_debug("Can't access file %s\n", path);
722 machines__create_kernel_maps(machines, pid);
731 void machines__destroy_kernel_maps(struct machines *machines)
733 struct rb_node *next = rb_first(&machines->guests);
735 machine__destroy_kernel_maps(&machines->host);
738 struct machine *pos = rb_entry(next, struct machine, rb_node);
740 next = rb_next(&pos->rb_node);
741 rb_erase(&pos->rb_node, &machines->guests);
742 machine__delete(pos);
746 int machines__create_kernel_maps(struct machines *machines, pid_t pid)
748 struct machine *machine = machines__findnew(machines, pid);
753 return machine__create_kernel_maps(machine);
756 int machine__load_kallsyms(struct machine *machine, const char *filename,
757 enum map_type type, symbol_filter_t filter)
759 struct map *map = machine->vmlinux_maps[type];
760 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
763 dso__set_loaded(map->dso, type);
765 * Since /proc/kallsyms will have multiple sessions for the
766 * kernel, with modules between them, fixup the end of all
769 __map_groups__fixup_end(&machine->kmaps, type);
775 int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
776 symbol_filter_t filter)
778 struct map *map = machine->vmlinux_maps[type];
779 int ret = dso__load_vmlinux_path(map->dso, map, filter);
782 dso__set_loaded(map->dso, type);
787 static void map_groups__fixup_end(struct map_groups *mg)
790 for (i = 0; i < MAP__NR_TYPES; ++i)
791 __map_groups__fixup_end(mg, i);
794 static char *get_kernel_version(const char *root_dir)
796 char version[PATH_MAX];
799 const char *prefix = "Linux version ";
801 sprintf(version, "%s/proc/version", root_dir);
802 file = fopen(version, "r");
807 tmp = fgets(version, sizeof(version), file);
810 name = strstr(version, prefix);
813 name += strlen(prefix);
814 tmp = strchr(name, ' ');
821 static int map_groups__set_modules_path_dir(struct map_groups *mg,
822 const char *dir_name, int depth)
825 DIR *dir = opendir(dir_name);
829 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
833 while ((dent = readdir(dir)) != NULL) {
837 /*sshfs might return bad dent->d_type, so we have to stat*/
838 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
842 if (S_ISDIR(st.st_mode)) {
843 if (!strcmp(dent->d_name, ".") ||
844 !strcmp(dent->d_name, ".."))
847 /* Do not follow top-level source and build symlinks */
849 if (!strcmp(dent->d_name, "source") ||
850 !strcmp(dent->d_name, "build"))
854 ret = map_groups__set_modules_path_dir(mg, path,
859 char *dot = strrchr(dent->d_name, '.'),
864 if (dot == NULL || strcmp(dot, ".ko"))
866 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
867 (int)(dot - dent->d_name), dent->d_name);
869 strxfrchar(dso_name, '-', '_');
870 map = map_groups__find_by_name(mg, MAP__FUNCTION,
875 long_name = strdup(path);
876 if (long_name == NULL) {
880 dso__set_long_name(map->dso, long_name, true);
881 dso__kernel_module_get_build_id(map->dso, "");
890 static int machine__set_modules_path(struct machine *machine)
893 char modules_path[PATH_MAX];
895 version = get_kernel_version(machine->root_dir);
899 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
900 machine->root_dir, version);
903 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0);
906 static int machine__create_module(void *arg, const char *name, u64 start)
908 struct machine *machine = arg;
911 map = machine__new_module(machine, start, name);
915 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
920 static int machine__create_modules(struct machine *machine)
925 if (machine__is_default_guest(machine)) {
926 modules = symbol_conf.default_guest_modules;
928 snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
932 if (symbol__restricted_filename(modules, "/proc/modules"))
935 if (modules__parse(modules, machine, machine__create_module))
938 if (!machine__set_modules_path(machine))
941 pr_debug("Problems setting modules path maps, continuing anyway...\n");
946 int machine__create_kernel_maps(struct machine *machine)
948 struct dso *kernel = machine__get_kernel(machine);
950 u64 addr = machine__get_running_kernel_start(machine, &name);
954 if (kernel == NULL ||
955 __machine__create_kernel_maps(machine, kernel) < 0)
958 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
959 if (machine__is_host(machine))
960 pr_debug("Problems creating module maps, "
961 "continuing anyway...\n");
963 pr_debug("Problems creating module maps for guest %d, "
964 "continuing anyway...\n", machine->pid);
968 * Now that we have all the maps created, just set the ->end of them:
970 map_groups__fixup_end(&machine->kmaps);
972 if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name,
974 machine__destroy_kernel_maps(machine);
981 static void machine__set_kernel_mmap_len(struct machine *machine,
982 union perf_event *event)
986 for (i = 0; i < MAP__NR_TYPES; i++) {
987 machine->vmlinux_maps[i]->start = event->mmap.start;
988 machine->vmlinux_maps[i]->end = (event->mmap.start +
991 * Be a bit paranoid here, some perf.data file came with
992 * a zero sized synthesized MMAP event for the kernel.
994 if (machine->vmlinux_maps[i]->end == 0)
995 machine->vmlinux_maps[i]->end = ~0ULL;
999 static bool machine__uses_kcore(struct machine *machine)
1003 list_for_each_entry(dso, &machine->kernel_dsos.head, node) {
1004 if (dso__is_kcore(dso))
1011 static int machine__process_kernel_mmap_event(struct machine *machine,
1012 union perf_event *event)
1015 char kmmap_prefix[PATH_MAX];
1016 enum dso_kernel_type kernel_type;
1017 bool is_kernel_mmap;
1019 /* If we have maps from kcore then we do not need or want any others */
1020 if (machine__uses_kcore(machine))
1023 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
1024 if (machine__is_host(machine))
1025 kernel_type = DSO_TYPE_KERNEL;
1027 kernel_type = DSO_TYPE_GUEST_KERNEL;
1029 is_kernel_mmap = memcmp(event->mmap.filename,
1031 strlen(kmmap_prefix) - 1) == 0;
1032 if (event->mmap.filename[0] == '/' ||
1033 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
1035 char short_module_name[1024];
1038 if (event->mmap.filename[0] == '/') {
1039 name = strrchr(event->mmap.filename, '/');
1043 ++name; /* skip / */
1044 dot = strrchr(name, '.');
1047 snprintf(short_module_name, sizeof(short_module_name),
1048 "[%.*s]", (int)(dot - name), name);
1049 strxfrchar(short_module_name, '-', '_');
1051 strcpy(short_module_name, event->mmap.filename);
1053 map = machine__new_module(machine, event->mmap.start,
1054 event->mmap.filename);
1058 name = strdup(short_module_name);
1062 dso__set_short_name(map->dso, name, true);
1063 map->end = map->start + event->mmap.len;
1064 } else if (is_kernel_mmap) {
1065 const char *symbol_name = (event->mmap.filename +
1066 strlen(kmmap_prefix));
1068 * Should be there already, from the build-id table in
1071 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
1076 kernel->kernel = kernel_type;
1077 if (__machine__create_kernel_maps(machine, kernel) < 0)
1080 machine__set_kernel_mmap_len(machine, event);
1083 * Avoid using a zero address (kptr_restrict) for the ref reloc
1084 * symbol. Effectively having zero here means that at record
1085 * time /proc/sys/kernel/kptr_restrict was non zero.
1087 if (event->mmap.pgoff != 0) {
1088 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
1093 if (machine__is_default_guest(machine)) {
1095 * preload dso of guest kernel and modules
1097 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
1106 int machine__process_mmap2_event(struct machine *machine,
1107 union perf_event *event,
1108 struct perf_sample *sample __maybe_unused)
1110 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1111 struct thread *thread;
1117 perf_event__fprintf_mmap2(event, stdout);
1119 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1120 cpumode == PERF_RECORD_MISC_KERNEL) {
1121 ret = machine__process_kernel_mmap_event(machine, event);
1127 thread = machine__findnew_thread(machine, event->mmap2.pid,
1132 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1133 type = MAP__VARIABLE;
1135 type = MAP__FUNCTION;
1137 map = map__new(machine, event->mmap2.start,
1138 event->mmap2.len, event->mmap2.pgoff,
1139 event->mmap2.pid, event->mmap2.maj,
1140 event->mmap2.min, event->mmap2.ino,
1141 event->mmap2.ino_generation,
1144 event->mmap2.filename, type, thread);
1149 thread__insert_map(thread, map);
1153 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1157 int machine__process_mmap_event(struct machine *machine, union perf_event *event,
1158 struct perf_sample *sample __maybe_unused)
1160 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1161 struct thread *thread;
1167 perf_event__fprintf_mmap(event, stdout);
1169 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1170 cpumode == PERF_RECORD_MISC_KERNEL) {
1171 ret = machine__process_kernel_mmap_event(machine, event);
1177 thread = machine__findnew_thread(machine, event->mmap.pid,
1182 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1183 type = MAP__VARIABLE;
1185 type = MAP__FUNCTION;
1187 map = map__new(machine, event->mmap.start,
1188 event->mmap.len, event->mmap.pgoff,
1189 event->mmap.pid, 0, 0, 0, 0, 0, 0,
1190 event->mmap.filename,
1196 thread__insert_map(thread, map);
1200 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1204 static void machine__remove_thread(struct machine *machine, struct thread *th)
1206 machine->last_match = NULL;
1207 rb_erase(&th->rb_node, &machine->threads);
1209 * We may have references to this thread, for instance in some hist_entry
1210 * instances, so just move them to a separate list.
1212 list_add_tail(&th->node, &machine->dead_threads);
1215 int machine__process_fork_event(struct machine *machine, union perf_event *event,
1216 struct perf_sample *sample)
1218 struct thread *thread = machine__find_thread(machine,
1221 struct thread *parent = machine__findnew_thread(machine,
1225 /* if a thread currently exists for the thread id remove it */
1227 machine__remove_thread(machine, thread);
1229 thread = machine__findnew_thread(machine, event->fork.pid,
1232 perf_event__fprintf_task(event, stdout);
1234 if (thread == NULL || parent == NULL ||
1235 thread__fork(thread, parent, sample->time) < 0) {
1236 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1243 int machine__process_exit_event(struct machine *machine, union perf_event *event,
1244 struct perf_sample *sample __maybe_unused)
1246 struct thread *thread = machine__find_thread(machine,
1251 perf_event__fprintf_task(event, stdout);
1254 thread__exited(thread);
1259 int machine__process_event(struct machine *machine, union perf_event *event,
1260 struct perf_sample *sample)
1264 switch (event->header.type) {
1265 case PERF_RECORD_COMM:
1266 ret = machine__process_comm_event(machine, event, sample); break;
1267 case PERF_RECORD_MMAP:
1268 ret = machine__process_mmap_event(machine, event, sample); break;
1269 case PERF_RECORD_MMAP2:
1270 ret = machine__process_mmap2_event(machine, event, sample); break;
1271 case PERF_RECORD_FORK:
1272 ret = machine__process_fork_event(machine, event, sample); break;
1273 case PERF_RECORD_EXIT:
1274 ret = machine__process_exit_event(machine, event, sample); break;
1275 case PERF_RECORD_LOST:
1276 ret = machine__process_lost_event(machine, event, sample); break;
1285 static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
1287 if (sym->name && !regexec(regex, sym->name, 0, NULL, 0))
1292 static void ip__resolve_ams(struct thread *thread,
1293 struct addr_map_symbol *ams,
1296 struct addr_location al;
1298 memset(&al, 0, sizeof(al));
1300 * We cannot use the header.misc hint to determine whether a
1301 * branch stack address is user, kernel, guest, hypervisor.
1302 * Branches may straddle the kernel/user/hypervisor boundaries.
1303 * Thus, we have to try consecutively until we find a match
1304 * or else, the symbol is unknown
1306 thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al);
1309 ams->al_addr = al.addr;
1314 static void ip__resolve_data(struct thread *thread,
1315 u8 m, struct addr_map_symbol *ams, u64 addr)
1317 struct addr_location al;
1319 memset(&al, 0, sizeof(al));
1321 thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al);
1322 if (al.map == NULL) {
1324 * some shared data regions have execute bit set which puts
1325 * their mapping in the MAP__FUNCTION type array.
1326 * Check there as a fallback option before dropping the sample.
1328 thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al);
1332 ams->al_addr = al.addr;
1337 struct mem_info *sample__resolve_mem(struct perf_sample *sample,
1338 struct addr_location *al)
1340 struct mem_info *mi = zalloc(sizeof(*mi));
1345 ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
1346 ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr);
1347 mi->data_src.val = sample->data_src;
1352 struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
1353 struct addr_location *al)
1356 const struct branch_stack *bs = sample->branch_stack;
1357 struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
1362 for (i = 0; i < bs->nr; i++) {
1363 ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
1364 ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
1365 bi[i].flags = bs->entries[i].flags;
1370 static int thread__resolve_callchain_sample(struct thread *thread,
1371 struct ip_callchain *chain,
1372 struct symbol **parent,
1373 struct addr_location *root_al,
1376 u8 cpumode = PERF_RECORD_MISC_USER;
1377 int chain_nr = min(max_stack, (int)chain->nr);
1381 int skip_idx __maybe_unused;
1383 callchain_cursor_reset(&callchain_cursor);
1385 if (chain->nr > PERF_MAX_STACK_DEPTH) {
1386 pr_warning("corrupted callchain. skipping...\n");
1391 * Based on DWARF debug information, some architectures skip
1392 * a callchain entry saved by the kernel.
1394 skip_idx = arch_skip_callchain_idx(thread, chain);
1396 for (i = 0; i < chain_nr; i++) {
1398 struct addr_location al;
1400 if (callchain_param.order == ORDER_CALLEE)
1403 j = chain->nr - i - 1;
1405 #ifdef HAVE_SKIP_CALLCHAIN_IDX
1411 if (ip >= PERF_CONTEXT_MAX) {
1413 case PERF_CONTEXT_HV:
1414 cpumode = PERF_RECORD_MISC_HYPERVISOR;
1416 case PERF_CONTEXT_KERNEL:
1417 cpumode = PERF_RECORD_MISC_KERNEL;
1419 case PERF_CONTEXT_USER:
1420 cpumode = PERF_RECORD_MISC_USER;
1423 pr_debug("invalid callchain context: "
1424 "%"PRId64"\n", (s64) ip);
1426 * It seems the callchain is corrupted.
1429 callchain_cursor_reset(&callchain_cursor);
1436 thread__find_addr_location(thread, cpumode,
1437 MAP__FUNCTION, ip, &al);
1438 if (al.sym != NULL) {
1439 if (sort__has_parent && !*parent &&
1440 symbol__match_regex(al.sym, &parent_regex))
1442 else if (have_ignore_callees && root_al &&
1443 symbol__match_regex(al.sym, &ignore_callees_regex)) {
1444 /* Treat this symbol as the root,
1445 forgetting its callees. */
1447 callchain_cursor_reset(&callchain_cursor);
1451 err = callchain_cursor_append(&callchain_cursor,
1452 ip, al.map, al.sym);
1460 static int unwind_entry(struct unwind_entry *entry, void *arg)
1462 struct callchain_cursor *cursor = arg;
1463 return callchain_cursor_append(cursor, entry->ip,
1464 entry->map, entry->sym);
1467 int thread__resolve_callchain(struct thread *thread,
1468 struct perf_evsel *evsel,
1469 struct perf_sample *sample,
1470 struct symbol **parent,
1471 struct addr_location *root_al,
1474 int ret = thread__resolve_callchain_sample(thread, sample->callchain,
1475 parent, root_al, max_stack);
1479 /* Can we do dwarf post unwind? */
1480 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
1481 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
1484 /* Bail out if nothing was captured. */
1485 if ((!sample->user_regs.regs) ||
1486 (!sample->user_stack.size))
1489 return unwind__get_entries(unwind_entry, &callchain_cursor,
1490 thread, sample, max_stack);
1494 int machine__for_each_thread(struct machine *machine,
1495 int (*fn)(struct thread *thread, void *p),
1499 struct thread *thread;
1502 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
1503 thread = rb_entry(nd, struct thread, rb_node);
1504 rc = fn(thread, priv);
1509 list_for_each_entry(thread, &machine->dead_threads, node) {
1510 rc = fn(thread, priv);
1517 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
1518 struct target *target, struct thread_map *threads,
1519 perf_event__handler_t process, bool data_mmap)
1521 if (target__has_task(target))
1522 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
1523 else if (target__has_cpu(target))
1524 return perf_event__synthesize_threads(tool, process, machine, data_mmap);
1525 /* command specified */
1529 pid_t machine__get_current_tid(struct machine *machine, int cpu)
1531 if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid)
1534 return machine->current_tid[cpu];
1537 int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
1540 struct thread *thread;
1545 if (!machine->current_tid) {
1548 machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t));
1549 if (!machine->current_tid)
1551 for (i = 0; i < MAX_NR_CPUS; i++)
1552 machine->current_tid[i] = -1;
1555 if (cpu >= MAX_NR_CPUS) {
1556 pr_err("Requested CPU %d too large. ", cpu);
1557 pr_err("Consider raising MAX_NR_CPUS\n");
1561 machine->current_tid[cpu] = tid;
1563 thread = machine__findnew_thread(machine, pid, tid);
1572 int machine__get_kernel_start(struct machine *machine)
1574 struct map *map = machine__kernel_map(machine, MAP__FUNCTION);
1578 * The only addresses above 2^63 are kernel addresses of a 64-bit
1579 * kernel. Note that addresses are unsigned so that on a 32-bit system
1580 * all addresses including kernel addresses are less than 2^32. In
1581 * that case (32-bit system), if the kernel mapping is unknown, all
1582 * addresses will be assumed to be in user space - see
1583 * machine__kernel_ip().
1585 machine->kernel_start = 1ULL << 63;
1587 err = map__load(map, machine->symbol_filter);
1589 machine->kernel_start = map->start;